So, why only male mutants?

[Bry]

Very possibly? Cartoon producers. For whatever outmoded reason they often refuse to make shows that appeal to more than one strict demographic. They want to make toys for boys and they want to appeal 100% to that market, instead of trying to expand it. To the point where many shows, like Young Justice for example, are cancelled because they attract a more diverse audience or "too many" girl viewers.

I hope that changes. I love the show, but April's very inconsistently written, Karai's largely been stripped of her agency, and Irma never really existed. The series could use some better representation, and a few girl/woman mutant villains would be a nice addition.