I personally consider myself a feminists and strongly believe in equality and women's liberation as well, and I doubt you'd find those beliefs commonly in MRAs. While I'm not particularly familiar with MRA spaces, from the outside it seems like they often feel that women owe them something, and should perhaps even be subservient to men. I certainly find that view rather repugnant.
I haven't personally experienced anyone considering me bigoted for talking about men's lib, and also haven't seen it much, if at all, inside our communities. I think that's because men's lib discussion tends to stay in men's lib spaces. I recognise that women are the main victim of the patriarchy, and raising men's issues in other spaces seems disrespectful. That's why I think we don't go out of our way to proselytise the way many other social justice movements might, so participant's engagement is purely at their own choice.
Almost the entirety of Lemmy is left leaning, even more so than reddit was. So unless you're over in specifically ML communities you're generally interacting with non-authoritarian leftists.
We've even got multiple entire instances with a strong non-auth leaning. (db0, vtc, etc)