1. You can't use Nintendo Switch Pro Controller on PC without Steam Input, at least not reliably so.
2. I can't, I am traveling tomorrow and will be far away from my computer for at least 6 months, possibly longer so I don't really have time. Still much packing to do. Best thing would be for you to get a Switch Pro Controller yourself and test it. Would also make fixing it faster since there wouldn't be any unnecessary back and forth.
__________________
Code:
.──.
│O_O │
││_╱ │
╱╱ │╲
(|▔╲ │ )
╱'╲_▔ _╱`╲
╲___) (___╱ TUX LOVES YOU.
|