Bazzar Offline and Gaming Mode Increasingly Broken Since Recent Updates

Hey,
I finally went ahead and reinstalled the system. Everything’s mostly fine, but after reinstalling I still don’t see FSR as an option.
I copied over some files by hand, but I’ve got no idea what might be causing the problem again.
I’m guessing Bazzite didn’t remove the feature from the GUI. All I did was move some stuff into .local and .var.
I also switched from KDE to GNOME, so I cleaned up before that and only took the stuff I really needed.

Any idea what I might’ve copied that brought the bug back?
And what should I delete to get a clean Gaming Mode setup?