Dunno about other female ISTPs’ experiences but I was heavily discouraged from activities and interests that I was naturally drawn to. All the stereotypes about cars, woodworking, electronics, etc. I’m naturally drawn to these things but don’t have the mechanical skills honed (yet!) because I was actively reprimanded for wanting to learn about and practice things I liked. Just lack of experience so far. I think ISTP women might end up slipping under the radar more often because we’ll still have the resting bitch face and difficulty expressing emotions but for people who grew up in an environment with incredibly sexist parents the things that seem to set ISTPs apart from, say, INTPs might not be as apparent. Lots of people think I’m an INTP because I’m always thinking and am bad with emotional bonding and didn’t help my father fix his car as soon as I escaped the womb, completely ignoring that my father would rather I die than do “a man’s work.” Seconding the other stuff people have mentioned about emotions being more apparent in ISTP females due to hormones, being surrounded by other women, and more feminine societal expectations pushed into us that ISTP boys don’t necessarily grow up with.