Yes Vegas Pro 19, here's the media info:

General
Complete name                            : I:\MISC\2021-11-12 Stairway and House Tour\Randy’s iPhone (2)\Recents\IMG_2465.MOV
Format                                   : MPEG-4
Format profile                           : QuickTime
Codec ID                                 : qt   0000.00 (qt  )
File size                                : 1.37 GiB
Duration                                 : 3 min 31 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 55.9 Mb/s
Encoded date                             : UTC 2021-11-23 11:24:47
Tagged date                              : UTC 2021-11-23 11:28:19
Writing library                          : Apple QuickTime
com.apple.quicktime.location.accuracy.ho : 13.592448
com.apple.quicktime.location.ISO6709     : +42.6798-086.0055+194.602/
com.apple.quicktime.make                 : Apple
com.apple.quicktime.model                : iPhone 13 Pro Max
com.apple.quicktime.software             : 15.0.2
com.apple.quicktime.creationdate         : 2021-11-23T06:24:47-0500

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main 10@L5.1@High
HDR format                               : Dolby Vision, Version 1.0, dvhe.08.0A, BL+RPU, HLG compatible
Codec ID                                 : hvc1
Codec ID/Info                            : High Efficiency Video Coding
Duration                                 : 3 min 31 s
Bit rate                                 : 55.6 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Variable
Frame rate                               : 59.166 FPS
Minimum frame rate                       : 30.000 FPS
Maximum frame rate                       : 66.667 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 10 bits
Bits/(Pixel*Frame)                       : 0.113
Stream size                              : 1.37 GiB (100%)
Title                                    : Core Media Video
Encoded date                             : UTC 2021-11-23 11:24:47
Tagged date                              : UTC 2021-11-23 11:28:19
Color range                              : Limited
Color primaries                          : BT.2020
Transfer characteristics                 : HLG
Matrix coefficients                      : BT.2020 non-constant
Metas                                    : 3,4,5
Codec configuration box                  : hvcC+dvvC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 3 min 31 s
Source duration                          : 3 min 31 s
Bit rate mode                            : Variable
Bit rate                                 : 183 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 44.1 kHz
Frame rate                               : 43.066 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 4.60 MiB (0%)
Source stream size                       : 4.60 MiB (0%)
Title                                    : Core Media Audio
Encoded date                             : UTC 2021-11-23 11:24:47
Tagged date                              : UTC 2021-11-23 11:28:19

General
  Name: IMG_2356.MOV
  Folder: I:\MISC\2021-11-12 Stairway and House Tour\Randy’s iPhone (2)\Recents
  Type: Intel HEVC
  Size: 1.88 GB (1,927,502,764 bytes)
  Created: Thursday, November 11, 2021, 4:19:22 PM
  Modified: Friday, November 12, 2021, 7:40:46 PM
  Accessed: Tuesday, November 23, 2021, 6:06:01 AM
  Attributes: Archive

Streams
  Video: 00:03:09.983, 60.000 fps progressive, 3840x2160x32, HEVC
  Audio: 00:03:09.978, 44,100 Hz, Stereo, AAC

ACID information
  ACID chunk: no
  Stretch chunk: no
  Stretch list: no
  Stretch info2: no
  Beat markers: no
  Detected beats: no

Other metadata
  Regions/markers: no
  Command markers: no

Media manager
  Media tags: no

Plug-In
  Name: mxhevcplug.dll
  Folder: C:\Program Files\VEGAS\VEGAS Pro 19.0\FileIO Plug-Ins\mxhevcplug
  Format: Intel HEVC
  Version: Version 1.0 (Build 8532)
  Company: MAGIX Computer Products Intl. Co.

Thank you for the info. The first thing to do in Vegas Pro is to go to Options/Preferences/Deprecated Features (tab) and check the 'Enable the QuickTime plugin' checkbox. This may be needed because the format profile is QuickTime. QT in Vegas Pro is a deprecated feature because Apple some years ago ceased QT support for Windows.

If that doesn't work, it may be that the variable frame rate (VFR) mode of the media (common to most phone video including Android phones) is not always accepted by Vegas Pro. A long history of this on the forum if you search VFR on the forum. The most common advice where VFR has caused a problem is to convert the media to Constant Frame Rate (CFR) via a utility such as the free Handbrake ( https://handbrake.fr/ ).

Ok tried turning off the variable frame rate, video still does not show, also tried handbrake to convert and no luck there either.

Info for video set to 60 frames:

General
  Name: IMG_2468.MOV
  Folder: I:\MISC\2021-11-12 Stairway and House Tour\Randy’s iPhone (2)\Recents
  Type: Intel HEVC
  Size: 80.81 MB (82,749,286 bytes)
  Created: Tuesday, November 23, 2021, 8:01:59 AM
  Modified: Tuesday, November 23, 2021, 8:02:25 AM
  Accessed: Tuesday, November 23, 2021, 8:02:25 AM
  Attributes: Archive

Streams
  Video: 00:00:07.950, 60.000 fps progressive, 3840x2160x32, HEVC
  Audio: 00:00:07.937, 44,100 Hz, Mono, AAC

ACID information
  ACID chunk: no
  Stretch chunk: no
  Stretch list: no
  Stretch info2: no
  Beat markers: no
  Detected beats: no

Other metadata
  Regions/markers: no
  Command markers: no

Media manager
  Media tags: no

Plug-In
  Name: mxhevcplug.dll
  Folder: C:\Program Files\VEGAS\VEGAS Pro 19.0\FileIO Plug-Ins\mxhevcplug
  Format: Intel HEVC
  Version: Version 1.0 (Build 8532)
  Company: MAGIX Computer Products Intl. Co.
 

What's your file i/o tab say? Is "enable legacy HEVC" checked? If so, uncheck it and restart Vegas. It should play back in Vegas but performance of highly compressed variable frame rate 10-bit HEVC isn't likely going to be good.

(Quicktime does nothing for this type of file.)

Bingo! Video now shows! But very choppy! Is there anything that can be done abou that? The video file shouldn't be variable frame rate, I set it to 60.

Yep, as expected. It is variable frame rate- look at media info, but it's a phone and that's how they work:

Frame rate mode                          : Variable
Frame rate                               : 59.166 FPS
Minimum frame rate                       : 30.000 FPS
Maximum frame rate                       : 66.667 FPS

Programs like Shutter Encoder or Handbrake can covert to constant frame rate AVC which Vegas likes better and is way easier to process.

Beyond that, right click on media and "create video proxy."

What's your file i/o tab say? Is "enable legacy HEVC" checked? If so, uncheck it and restart Vegas. It should play back in Vegas but performance of highly compressed variable frame rate 10-bit HEVC isn't likely going to be good.

(Quicktime does nothing for this type of file.)

Bingo! Video now shows! But very choppy! Is there anything that can be done abou that? The video file shouldn't be variable frame rate, I set it to 60.

What are you using as GPU decoder? If it is AMD or Nvidia, there is no GPU decode, so can't expect 4k60 HEVC to play smoothly. It is a bug they don't fix. If you have a working Intel IGPU, Vegas should have auto selected it as GPU Decoder. Vegas is not good at playing back 60fps HEVC even if you are using GPU decode but you most likely are not using GPU decode by your 'very choppy' remark

@Ehemaliger User Yep agreed, I used to struggle with HEVC (H.265) , i swapped my old phone over to AVC (H.264) which plays a lot better in Vegas, also when rendering out from Vegas use MAGIX AVC/AAC not MAGIX HEVC/AAC to get better playback if later re-importing back into Vegas.

An iPhone website says -
Open Settings > Camera > Formats.
Under Camera Capture, you have two options: High Efficiency, or Most Compatible. Tap on the one you’d like to use.
High Efficiency uses HEIF and HEVC for your photos and videos. 
These take up less space but may be incompatible with older devices. Most compatible uses the standard JPEG/H.264 formats. Note: 4K at 60fps and 1080p at 240fps requires High Efficiency to be enabled.'

It can be seen if you right click on the media on the timeline - Properties - General

@Ehemaliger User He's recording in dolbyvision HDR, these are the specifics

• The Dolby Vision iPhone recording specifications:
• Codec/Format : HEVC Main10 video in Apple Quicktime container (.mov)
• HDR format: Dolby Vision with HLG base layer (Profile 8.4)
• Transfer Characteristic: HLG (ITU-R BT.2100-1)
• Color primaries: BT.2020
• Chroma sampling: 4:2:0
• Bit depth: 10 bit

I don't have an Iphone 12 or 13, but it looks like there is no AVC option, so there is no GPU decode unless you're using an Intel with an IGPU enabled. It's baffling to me that they don't fix this HEVC 10bit problem, Iphones are the majority of phones sold in USA

@Ehemaliger User 👍 I don't have an iPhone either, i bought one for someone not long ago & going through the specs i suggested changing that setting if they were going to be editing, don't know what came of that but my old Huawei (most hated, couldn't wait till my contract ended, gonna fix it with a hammer) phone, i turned it off about 4yrs ago & this Samsung S21 Ultra i've not enabled the HEIF, I mainly film 4k 30fps now, don't know if 4K at 60fps needs it on like the iPhone says it does, & It'll film in 8k but i never do, i've nothing that'll play that on my PC 😕 & it was a while ago so might try again but i think Vegas says no when i import 8k 🤣, i don't know if it comes on automatically with that 🤷‍♂️ so yeah they all need to get their act together.