Steering wheel not recognized in-game

Hello!

I have a steering wheel + pedals controller (SuperDrive SV650) that is not recognized by Steam (in the controller settings) nor in Eurotruck Simulator 2. So I went back to Desktop mode, went to the Bazzite controller settings, and I see my controller (/dev/ input/event) working fine here.

I guess that Steam in SteamDeck mode is filtering weird controllers. And I don’t see the Generic Controller Settings in the Steam settings.

Are my assumptions right? Do you know how to fix this?