Does the game start after you click Play (button turns to Stop), then almost immediately crash/close (button turns back to Play, game isn’t running)?
I’ve had that happen a few times, not related to an OS upgrade, but maybe a similar solution might work? For me, deleting that game’s corresponding compatdata folder (where its fake Windows installation is housed) - being sure to copy out any save games stored in there - and then trying to Play again worked, as Steam set the Windows environment back up fresh. Kind of like reinstalling Windows, just in a few minutes vs. hours!
I’ve tried multiple versions of proton, including GE. Treid forcing Wine D3D instead of Vulkan. Something is broken after updating from f35 to 36. Not my configuration. I’ve reinstalled graphics drivers, i’ve reinstalled steam multiple times on both RPM fusion and Flat Pak. nothing works.
You know… I expected my custom audio pipewire configurations to break and having to reinstall graphics drivers… But upgrading to 36 has cost me the ability to play proton games and now I’m unable to update to 37 because the dnf system-upgrade wont take the --allowraising or --skip-broken options.