EndeavourOS (Arch Linux) user here.
Is this just me? Everything works perfectly, but if the controller turns off and on again while a game is running, it’s no longer recognized, and this forces me to restart the game.
I don’t know how useful it is but I tried to join the input group, nothing changed.
While I’ve had some nagging KDE session issues, thankfully using an xbox controller has thus far been a great experience for me in Bazzite. On Windows I had to replug my dongle after every. single. freaking. reboot.
Hope you get it sorted soon.