Most ESTP women I've encountered were actually very feminine in the classical sense (hair, make up, trendy, revealing clothes and yes, sometimes even some plastic surgery). Se Doms have a tendency to really put emphasis on stereotypical gender appearance. In that same way, that's why your stereotypical ESTP male is often a gym freak, showing off his biceps, tattoos, swearing and spitting all over the place, you know, to emphasize the fact that he's ''all man''.
However Ti is what makes ESTP women seem more ''manly''. Not comfortable with that word, but that's all I come up with now. And that's because speaking and analyzing things purely through their own logic, they can come off as being more boy-like in their approach to things. It's obviously societal bias through norms but that's pretty much it.