SC Controller, what originally started as an application to control the Steam Controller outside of Steam and expanded to cover more gamepads now has a pre-release up with Steam Deck support.

This means you can control the Steam Deck gamepad, Steam Controller, PlayStation, 8bitdo and many others without the need for Steam Input — for whatever reason you can think of.

I enjoy that classic Steam skin a bit too much.

While it's a pre-release meaning it needs more testing, it does appear to work quite nicely including flawless switching between SC Controller handling inputs and turning it off to see Steam Input then take over again. I've no doubt plenty of people will make use of this.