the reason you dont see "tomboys" anymore is because tomboy is a kind of an infantile term used to describe little girls or teenagers. grown women dont really call themselves tomboys that often. most often they call themselves butch lesbians
and of course masculine straight c1s women exist but they don't call themselves tomboys, they don't really call themselves anything except for grown women bc outside of childhood, being a woman who's not super feminine is actually pretty normal
"pretty normal" what am i saying its extremely normal and in fact women who are super feminine are actually the minority dont let beauty standards trick you. there are beautiful masc women everywhere, gods gifts