Glad you were able to resolve your issues. I just decided to take a chance on one of these NAB6 (32GB, 1TB) for a budget workstation, but having a heck of a time trying to get 1440p @60Hz out of Win11 Pro with the built in graphics. Sorry to piggyback on your message, Reddit has become a bit of a cesspool as far as technical assistance.
Probably should (i did) start my own post, but i’m curious how your overall experience has been with the intel Minisforum NAB6. Not being able to run my dual 1440p displays (currently at 1080p) is going to become a dealbreaker real fast, oof. Hopefully it’s PEBKAC and nothing more. Will keep tinkering, just got it unboxed.