In a flashback, when Eda and Lilith were children, we saw a glimpse at Amity parents when they were children. It would seem she looks more like her mother, but has her father’s brown hair.
But that still leaves the question, why does Amity dye her hair that mint color?
Maybe because her mother wants her to have her hair color instead of her father’s so she can look more like her. They even go to the same magic track and have the same eye color so it could be that her mother doesn’t see amity as her own person just a version of herself that can achieve more in life then she can instead of just trying to pursuing what she wants herself.
I haven’t gotten to the lesbian part yet. In fact,Luz was all into a dude at one point. Eda was implied to have had a couple boyfriends,wasn’t she?
It’s definitely not as overt with Lesbians as She-ra was.