I'm a trans man who's only attracted to men. Was never in the lesbian world before my transition. I was mostly in the straight world, but even as a girl I mostly ended up with bi guys. I did think I might maybe have a mild attraction to women during my teens and early 20's and thus called myself bisexual, but still only dated men, and a couple of years ago those feelings disappeared and I find myself being turned off by women and female secondary sex characterstics now. I can't imagine being in a relationship with a woman, but might want to try having sex with one just out of curiosity and/or for fun, if she'd be fine with that then of course. Cause I can enjoy sex with people I feel no attraction towards, if I'm just horny and stimulated enough...
I do sometimes get attracted to other trans men, but only if they're at least somewhat into transition. Like they don't have to pass 100% but yeah, at least some maleness to their bodies.
I don't think my change in sexuality was because of T, cause I had already been on it for several years when I noticed that shift. However, I did go through a very stressful life event at that time which changed a lot of my personality traits and how see myself in general also in terms of my gender, expression and sexuality. So I think that's the reason I went from being bi to gay.
I too have felt a stronger attraction to male bodies since I started transitioning, however for me it's more like I've been... uh, kind of idolising maleness. Both in terms of wanting to have a male body myself and in terms of being sexually attracted to maleness in others, as in almost worshipping their bodies. But I try to not be creepy about it. I kinda see it as a "two way attraction" for me, that goes both inwards and outwards.