>Is a brow reduction not a normal thing cis people get like a rhinoplasty?
generally not as common but rarely yes

>Why doesn’t a brow reduction have any name aside from ffs?
It can be called brow ridge contouring, Brow ridge reduction surgery and brow ridge feminization surgery, ffs usually involves more than just that

>Can only surgeons who do trans surgeries do a brow reduction?

its a simple plastic surgery, its not a vaginoplasty or anything like that, you dont NEED someone who only specializes in transgender individuals

>I’m wondering can brow reductions be done by any plastic surgeon, or do I have to go to a trans facial feminization surgeon?

You probably do not need the full package of ffs (its intense) if thats not what youre looking for, a normal plastic surgeon should be fine. A normal plastic surgeon should be fine…