Wanna write a story about a trans guy

How do I not make an offensive pooner character?

Obviously no "I love my boy titties". But like any other pitfalls to avoid?

Tbh this question is overly simple, I mean I'm basing my story in a real person I once met. And Ive never spoken to them but I'm 80% sure they are a repper. Always hiding their boobs. Having masculine / androgenous fashion.

But maybe they are just nonbinary? No idea.

Anyways I want to put that person into my story but I'm not really sure how to execute it without it just ending up being like "wow so valid non transitioning she/her dood "

I don't know their gender, and I don't think the audience of my story deserves to know either.

Any advice?