At least in the context of Iran, I can say that a lot of it is due to an Iranian Trans acativst and revolutionary, corresponding with Khomeini consistently, and making the argument in favor of an Islamic interpretation of Trans identity, which would persuade him to adopt it as theological doctrine.

Her name was Maryam Khatoon Molkara.

This is actually true.

It seems that homosexuality and bisexuality are less accepted than "cross-dressing" or presenting as the "opposite gender."

Are you referring to how one can exist as Iranian and communist in America, particularly in Texas, or how can one be communist anywhere in Texas?

I know that DSA, PSL (I think), and CPUSA have grown extensively there in the last few years, but it's also a very big area, and I don't know how much the growth translates into actual presence there.

FYI, my friend in the DSA there is apart of the labor committee, I believe.