Fempunk

 is a non-binary gender that is feminine but not at all related to [being] female, and rejects society’s definition of female.

Definitions

 * a gender that is feminine but not at all related to [being] female, and rejects society’s definition of female. - genderthaumiel, 2020

Feminine in this case refers to gender femininity and/or feminine presentation(or any other form of femininity that is important to the individual). Femininity and feminine genders are entirely separate from being female/-aligned, and feminine =/= female-ish.