I've connected the Steam Link App on my AppleTV with my Steam Library on my PC. Connection runs over LAN and my XBox controller is connected with bluetooth to AppleTV

If I would play a game directly from my Steam Library everything works fine with controllersupport as I would use it directly on my PC.
If I play a game that is not in my Steam Library (added as non-steam-game) my controller is only detectet as mouse and keyboard.
I tried many settings but nothing changed. The games are vom Microsoft Store and Origin (EA App). Always the same Issue

Does anyone knows how I can Fix it? Thanks alot