I unlocked and researched the entire Androids tech tree, and have built factories on several planets during my Romulan game.

Now after about 80 years of having the tree fully unlocked the population has yet to grow beyond the original 100 units you get.

Not sure if this is intentional or an issue with the changes to the Population system that Stellaris 4.0 brought in, but it may be something to look into.

Great work with the mod! I am really enjoying it!