I am in the process of writing a guide that adds to the provided rpi4.build file what I have been doing for years (on QNX 7.1) to produce a functional RPi4 image. It also explains the additions and changes, and why I've made them. I haven't published it anywhere but if there is interest I could. If it reduces any pain and further promotes what Blackberry QNX have done!

I have made this effort as I realised that people wanting to try QNX8 would quickly hit a bit of a brick wall (like I did) and possibly loose interest. I am not keen for that to happen! I myself hit the wall when I tried to log in but I have a bit of past experience to fall back on to sort it out. Fortunately I had my serial terminal set up - without it I would have been stuck.

It's still in the proof reading and testing phase but might be ready in a day or two (after Thanksgiving). I need to figure out how to get it into the relevant GIT place.