Problem with Wii U Pro Controller on Steam

[G2ThaUNiT]

Yeah, what Yuri suggested of making your controller wired to see if it works that way should've been troubleshooting step number 1

I have a Series X controller with the Xbox Wireless Adapter for Windows and it works flawlessly.
https://www.amazon.com/Microsoft-Xbox-Wireless-Adapter-Windows-one/dp/B00ZB7W4QU