I have put the Rock64 Android 9 source code up here:
https://github.com/a9rock64/manifests
It boots but it needs work.
Neither Ethernet or Wifi is properly configured.
It does not have gapps integrated.
Several more minor issues
On the plus side it looks like OTG/adb is working now.
This is not ready for a casual user.
If your are Android developer please give it a try and help fix the broken parts.
Send me email and I will give you write access to the repositories.
https://github.com/a9rock64/manifests
It boots but it needs work.
Neither Ethernet or Wifi is properly configured.
It does not have gapps integrated.
Several more minor issues
On the plus side it looks like OTG/adb is working now.
This is not ready for a casual user.
If your are Android developer please give it a try and help fix the broken parts.
Send me email and I will give you write access to the repositories.