Is the game supposed to generate female soldiers by default? I know they are there in customization but I don’t think I’ve ever had one randomly generate. Is there an option to enable this?
No option, and they are few in number.
Actually they are quite often I think. But they just have male names. 
It’s RNG, that’s all. Was a while there I got nothing but female recruits, generally though it’s been a fairly even split.