I'm currently going through something similar: trying to create a hardware prototype for a tablet-like device. Even getting a board that supports eDP is a pain, and there is very little information out there that explains whether the panels are compatible with anything. I decided to just buy a RockPro64 + some generic LCD panel with an eDP hoping it will just work, but my confidence isn't high and I'm not sure where I'll go if it doesn't work.

I also couldn't find a place with people who know this stuff that could help me. It seems that getting software help is so much easier. Does anyone have any suggestions?