This seems to be a serious and common issue. A transman posted her story on twitter, and there has been a number of other accounts shared. Including one where the victim in question was only 12 years old! You can see the two posts here:
https://x.com/ged68050/status/1917311182223929615
Have others come across this issue before? I remember reading a while back about Rose Montoya (the trans-identified man who exposed his breasts at the white house) raping several transmen, including one recovering from genital surgery and unable to fight back. There were also reports of Eli Erlick (a trans-identified man and activist) committing severe sexual assaults (forcible fisting) on several transmen.
Both victims on twitter spoke about attempts to silence them within the transgender community and shaming for having spoken up. I wonder how many other victims there are of this kind of VAWG, and if they are being obscured due to their self identification as men and their attacker's self identification as women.