I'm a Canadian woman, who was in jail in 2019. In 2018, Canada permitted self-identification as a reason for males to be allowed to be incarcerated alongside females.
During my incarceration, we had two trans women on our range. One was attracted sexually to men, taking hormones and living as a trans woman prior to being incarcerated. The other was sexually attracted to women, had facial hair, had not yet begun taking hormones and their assertion of being a trans woman occurred while they were incarcerated.
This latter individual cornered a young woman in her cell and made sexual advances towards her. The correctional officers had to intervene and the person was removed from our range. I don't know where they went afterwards. This was an entirely avoidable trauma for the young woman.
Our safety was compromised because of the lack of safe guarding for females that self-identification allows.