Using the current version on EPIC. I am unable to create a custom faction that is both synthetic and has the yor tech tree. Even copying the Yor custom faction and playing an exact and direct copy ends up with the default tech tree and is unable to build population

Starting the game as the original Yor faction does not present any problems. Propagation shows up as normal.

The custom faction also does not seem to be directly editable in order to swap the tech tree directly.

Solved?: Mod was interfering in an unexpected way.. But not the mod i thought it was and not in the way i thought it did.  But figured it out. Apparently an almost direct copy of a file in the main games folder that was replaced as a mod was causing the problem? Not sure why.