Nintendo Switch's Pro controller actually works natively with PC games, but only when paired via Bluetooth.

How to connect a Switch Pro controller to your PC Wireless The Nintendo Switch Pro Controller supports standard Bluetooth, allowing you to pair it wirelessly with your PC.

Nintendo Switch Pro controller review This high-quality, well-built gamepad is comfortable to hold, and it can also be used for PC gaming, although it has a few shortcomings.

How to use a Nintendo Switch Pro controller in Steam The feature’s only available in the beta version of the client for now as it prepares for full release.

They took an RC controller, and converted it to work with XInput instead. The controller in question is the JJRC Q35-01, a trigger-type RC controller available for under $20.