I'm a Media Composer and still on Vegas 19. I basically only use it to check my scores before submitting them for client approval. I have recently rebuilt my studio to deliver ATMOS7.1.4 mixes and noticed that ver. 19 is still only 5.1 surround. Doe the latest version of Vegas support ATMOS?
The audio choices in project properties in vegas Pro 20 are the same as in Vegas Pro 19 - stereo and 5.1 - so it would not seem that ATMOS is available in vegas Pro as yet. Also, ATMOS does not appear as a new feature in VP20's "What's new in this version" feature list.
There's a free trial version of Vegas Pro 20 that you can install to check it out for yourself.