Hello!
I can try to add a Switch Pro Controller, if that's the one you have. How do you want the buttons mapped? You can find all the input commands on the game page. (Throttle, brake, steering, turbo, ...)
Wheel support will be added in the future. The problem is that I can't test it since my own wheel isn't installed at this moment and 2nd: the input system is a bit intimidating.