I think it might be a very specific issue on my end since I'm using an 8bitdo usb adapter with a xbox one controller so I'm guessing it's not registering the controller as there. If anyone has a solution to this I'd be so happy to hear it but mostly wanted to post just to make it known that not everyone is able to use a controller currently.

I had to run the executable outside the launcher to get it to recognize the DualSense Edge controller. It won't recognize my Google Stadia controller no matter what I do.

Not detecting the "built-in" controller on the Legion Go S for me, at all. I had to setup joy2key in order for it to work.