I think the term you’re looking for is called Sexual Dimorphism, and I have only ever heard edge-lord-feminists call it sexism. Most feminists that I have met acknowledge it.
Edit: to be clear while the conversation of gender equity is in part concerned about sexual dimorphism, the human species as a whole is sexually polymorphic. However the discussion of Turner’s syndrome, Klinefelter’s syndrome, ect is tangentially related.