Halfway. I am saying it in a way that I know will be somewhat provocative on purpose, but what I am saying is genuine and the reason I posted here was to check in if females had been added by one of the expansions or not. I really don't like when I can't have female characters in a squad based tactical games (assuming the units are human/humanoid in the first place), and generally a squad based tactical game only having male characters is a hard pass for me. So it is unplayable for me, as I will not play it.
Sounds pointless to me to skip a really good game just because it doesn't have females, but you do you.
There are lots of things that people may consider cosmetic and not care about, but they contribute to the overall gameplay experience for others. Stuff like art style, quality of graphics, is equipment shown on in game character models?, character customization, etc... Included in that would be gender and ethnicity of characters. To turn it around, how many people in this thread would be less interested in a game where you only had female characters or you couldn't have white characters?
Now none of this need affect gameplay at all, but it affects the overall gameplay experience a person has, which can have a big impact on how much a person enjoys the game.
In general this can be summed up as gameplay vs graphics. Although some things that are not not technically graphics would be in there, so maybe aesthetics would be a better term.
While I am sure many people may claim to care only about gameplay and not one bit about graphics (aesthetics), I don't believe them. I doubt there is even a single person that is true for. Some people may strongly value the gameplay over aesthetics, but I doubt there is anyone whose gameplay experience isn't impacted by the aesthetics at all.
And the aesthetic impact being strong enough to make a person less interested or not interested in a game is pretty common.
Preferring female characters models in games is also hardly a rare thing. Something worth considering if you are making games. You are definitely leaving some sales on the table if you don't have that option, and that is something to weigh against the resources needed to add them in.