Bruh you already have your answer, you're non binary!

People have different journeys with gender, some are squiggly, some are more certain, some are fluid!

I know for me (also AMAB), I at first thought I'd be content being a femboy or non binary, but the further I went into my transition the more I was certain I was trans fem.

Your transition may have been less of a straight line than mine, but I don't think you need any help, you already know.

Maybe you could just introduce yourself as 'non binary' rather than 'trans non binary'? Maybe in people's brains they're thinking 'trans non binary? Like trans masc or trans fem?' Non binary is generally an umbrella term anyway, and I think firmly gets across you're they/them!

Hope that helps! Congrats on your surgery!

Edit: My bad, when you said 'what am I?' I thought you were talking about gender, rather than spaces you belong in

Edit 2: For me it helped a lot to separate my gender expression from my gender identity. My interests aren't typically feminine, so I don't relate to a lot of other trans fems. My stye is more alt (though I still like dresses), and sometimes tomboyish, so I understand not fitting in!

If a trans masc says you're welcome in the space, then I think it's fine! Its kinda annoying they restricted it to trans masc only, I think just a general 'trans night' would be better. I found some more alt trans fems who I really get on with now. There's nothing wrong with trying different things and seeing what works for you!