Transgynephobia is people putting the comfort of cis women over the safety of trans women at all times.
God, don't you dare be in the girl's hotel rooms because that one girl doesn't like you being there minding your own business and sleeping; stay in the boy's room where they will all assault you, and we won't do anything about it!
Literally what happened to the trans girl in my grade. I wasn't publicly out as a trans man and used that to try to protest against it by saying that I wouldn't go if she wasn't allowed to sleep with us. Sadly it didn't work even though the school tried to make a big deal of me refusing and not going. She ended up being harassed by the boys anyway :((
This is trans-misogyny, we are expected to be abused and be silent about it. Because we are women enough to be abused, but not actually women in the eyes of the patriarchy so we are not afforded any of the social protections womanhood typically offers. The perfect abuse object.
Thank you for at least attempting to help her, even one voice can make the world of a change. At least she knew someone cared...