Hello @Sunspark-007, you've described an issue with the Steam client instead of an issue with SteamOS as a platforn, so I've transferred this issue report to the steam-for-linux issue tracker.
On Steam Client Beta - September 6th update, I seem to be having the similar problem ? I can't bind function key for shortcut. It register as regular key like, X, Y, X, [ for F9, F10, F11, F12 respectively. Work as intended on stable.
OS is Nobara 40 (based on Fedora 40). I'll get the logs when I have the time to try beta channel again.
Nothing extracted yet.
Steps for reproducing this issue:
No key can be clicked on with an external controller or keyboard that I have noted.