I'm working on a simple re-skin mod that will give the Ptolemaic faction's native Egyptian units (such as the female citizen and the Egyptian pikeman) darker skin tones through mesh-swapping. As of this morning, I've managed to get the female citizen's re-skin working, but not the re-skin for the pikemen, and I need to change the unit icons as well.
UPDATE 8/22/22: Remade this whole mod from scratch. The .zip file is attached to the OP. Results are viewable in the screenshot below:
egyptian_reskin.zip