There is no such thing as “transgender men who are now women”. As an undeniable, immutable scientific fact, it is biologically impossible for a man to become a woman, or for a woman to become a man. Only those, like you, who are deeply fucked-up in the head, believe in this bullshit.
There are also plenty of accounts of “transgender women” raping actual women, in women's prisons.
Those who advocate putting male sexual perverts in women's prisons, or allowing them access to other women's facilities, are complicit in whatever crimes these freaks end up committing against actual women.