Thanks for the new driver info, I’m about to go through the same thing. Please keep us posted how it goes, as many readers will learn from it.
Unfortunately my Chuwi Hi13 was almost unusable as a tablet with fingers only support. It worked a little smoother with a Bluetooth keyboard, but still a no-go by my standards. Started a “fresh” windows reload, but now I’m locked out of it for a few days (had to order the original docking keyboard) *sighs*
I also had the really bad sound problem, low volume and crackles/hiss. Sounded fine on BT headphones though. Weird.
I’ll be watching your post with enthusiasm, so Best of luck!