I've been doing some research on Masha P. Johnson, it's interesting. There's not that much information I can find about her, but while most modern articles call her transgender, every article written around the time of her death and when she was alive calls her a drag queen or transvestite. In this article from 1979, she's quoted as saying:

“For the last 17 years,” Marsha said, “my life has been built around sex and gay liberation, being a drag queen and dating all the time. It can get very boring you know, darling, all these men. Some­times they hassle me if they thought I was a woman when they picked me up. I just say: ‘Honey, this is like Macy’s Depart­ment Store. If you like the merchandise, you take it. If you don’t, I got to go.’ I’d like to stop hustling and have a regular husband. It’s easy to get a husband, but it’s not easy to get them to, support me, or pay the bills, or give up sex. Because, honey, gay men don’t give up sex for anything. My best husband — I met him dating — was a junkie and he got shot in a robbery. He wasn’t a very good man, but he used to give me everything. I’ve had eight husbands and eight separations and none of them have given me a white house and picket fence.”

Anyone who tells you Marsha P. Johnson was a "transwoman" is a historical revisionist.