dont have that but i know i have to restart my 8bitdo ultimate bt controller for it to even register in steam then rotate the sticks 1 full rotation when its in switch mode so the sticks get centered so maybe something similar?
only time I needed dinput was for pressure sensative controllers so I get different levels of input with the face buttons and r1 l1 rather than 0 and 1
just wanted to chime in again, ive been on bazzite-nvidia:testing for a day now, and i havent had any issues as of right now. played a bunch of games, did my daily desktop tasks, and had so issues whatsoever except the firefox thing