DJI Mavic 4 PRO drone seems to only create 10 bit video files, and they are too slow to edit or render. So are there any options other than converting them to 8 bit before using in Vegas Pro?
Strange, my DJI Osmo-pocket 3 produces 10bit HEVC 4k mp4 files, which I assume are the same as your DJI Mavic 4 Pro video files, those files are playable and editable in VP22/VP23 without any restrictions compared to the 8bit files from my earlier Osmo-pocket.