I think it’s a good question that needs some answers. There are so many XBox settings re HDR/VRR/60Hz/120Hz/Dolbyvision etc. Yet mysteriously no recommended settings for optimal FS2020 performance.
When I try to find out framerate on my LG OLED UHD TV all I get is a report of ‘fixed’ or ‘VRR’ with no report of precise framerates involved. I have it switched to Gaming display mode too, but thought this was just a visual output thing (brighter colours etc), and had no effect on FS2020 framerate. Who knows, there are too many variables and not enough official recommendations.
However if you see the TV report a framerate of 60, is that really 60fps (in game/FS2020) or is it not just a symptom of a 60Hz refresh rate on XBox/TV ie FS2020 still outputting at 30 fps, so no real framerate improvement in game is really happening. I guess what I’m saying is that you can’t really be certain that what your TV tells you is actually what FS2020 is outputting.
On PC you can use the XBox gamebar to quickly find framerate out, not sure if this app is available on XBox though.