Just saw a post saying (among other things) that transmascs / trans men shouldn't have a place in lesbian spaces or identify as lesbians (if they want to) because "you don't regularly* see transfems fighting for their place in gay men's spaces, claiming they were 'part of it all along'."
Putting aside that oppositional reasonings like that are non-sequiturs, this just shows once more that people don't actually know the communities they're talking about. If you spend even one evening in any gay bar catering to people ~50 and over, you would realise that there are a lot of trans women / transfems, especially those of that age bracket, who consider themselves to be a part of specifically gay male / gay men's communities. This is not because they themselves have to be male or men (although some do consider themselves to be such), but because those are their friends and families. That IS their community.
Those are the people who welcomed them when they got thrown out by their families and socially ostracised, the people who suffered through the heights of socially accepted queerphobia and the AIDS crisis with them, the people who had support and networking opportunities for them, the people who already were their community back when they perhaps did consider themselves to be gay men. And again, some still do anyway, because contradictory and multifaceted identities exist! (I had a trans woman at my former job at one of those places tell me that, yes, of course she is a woman — But a small part of her will always remain a gay man, and that part lives here with her oldest friends. That's her call to make about herself, don't you think?)
What I'm trying to say: There are many trans women and transfems who earnestly are a part of gay men's / gay male communities, and have been for longer than most people on here even exist, just maybe not in your social bubble. Some consider themselves to be a part of these communities by virtue of literal community, some by identity. This is not a statement about all trans women or transfems, but it is a statement about these particular people's existence, about contradictory identities, and practical community-sharing. The same applies to transmascs / trans men in lesbian spaces.
Especially among our queer elders, the communities are often much, much more interlocked than modern online-discourse wants you to believe, and identities aren't always as clear-cut as we try to make them be by pushing them into neat little boxes. So yes, some transfems did and do fight for their place in gay men's spaces, claiming they were part of it all along. Because they are. Just as some transmascs do, and are, in lesbian spaces. Both is fine, if that's what they want. (And even if it weren't "fine", it's still the way real-life communities exist.)
*OOP's post said "don't regularly see", which they (no pronouns listed) are using as an excuse as to why rebuttals like "but that does exist!" are off the mark. I think this is nonsense, because in both cases we are talking about a minority within a minority. Transmascs as a whole aren't claiming they inherently belong in lesbian communities. Transfems as a whole aren't claiming they inherently belong in gay communities. But subsections for both exist, and I would argue with similar regularity, especially if one takes a look at older irl communities where the "always have been" version is more common. That is the point I'm making.