Seems weird to have a male boss refer to people lower in the corporate hierarchy as "sis." It seems like it could be seen as demeaning? Idk. Never been in those shoes.
Since I don't present fem, the only fem-leaning term I've had someone regularly call me is "Queen," which was fine with me (but on occasions resulted in confused looks from others). The same person would also call me "bro" sometimes which would annoy me. Otoh, I have no problem with my siblings calling me their "brother" and probably prefer that to "sister" I think. But I don't like being called "son" by my mom.
Still, I think "bitch" still my favorite gendered term someone used to refer to me, but that may be context dependent.