Would it be possible to add a sort of contingency that I vaguely kinda remember the original games mod having (but I could easily be remembering how that worked wrong) where for example if you didn't have any or very few explicitly futa portraits for a race the game would then just give them a random female portrait instead?
Within settings.gd in the conquestrandportraits folder that you put in appdata\roaming\strive for power 2\mods, there is a variable minMatch=2. set that to -1 like minMatch = -1. That will do what you want, though it may periodically choose an otherwise valid male portrait as well so you may need to re-randomize it. I could do a more thorough change if it was demanded by a lot of people, but some may prefer futa being pushed to male, so I'd rather keep it random. If you would like to change the code yourself so that it changes futa to female without ever accidentally picking male, I can post the code changes here, but you would have to maintain it every update.