I have an off-brand Nintendo Switch Pro Controller that Stadia is not recognizing as a controller. It connects to my laptop just fine, but stadia will not recognize it. Are there any hints/tricks/ drivers that could help Stadia connect to this controller?
Check out this post on Reddit:
https://www.reddit.com/r/Stadia/comments/fychv1/guide_how_to_use_an_unsupported_third_party/