Forza games don't work well with the Linux Nvidia drivers unfortunately.
Not sure if this is a vkd3d-proton or Nvidia driver issue though.
Game runs better on AMD overall so I think it's optimized for AMD, I can't get it to run at all on Linux with Nvida, it starts tho' but then crashes.
ge-proton8-12x1 2023-07
Start a fresh game, and play the intro races and it crashes when you finish racing the motocross bikes and you see the airplanes during the next race.
System information
Log files