@Baileyonice -- I've got some numbers for you.
Let's go with 0.5% of the pop is trans (I don't know how accurate this is, but it's your figure). So let's say about 130,000 adult transwomen.
MoJ figures (Nov 2023): between 95 and 99 trans-identifying male prisoners without a GRC (so this is probably an undercount) are in for a primarily sexual offence.
That is 1 in 1,313 of transwomen currently in prison for a sexual offence.
Total adult female population about 27,000,000.
MoJ figures: female prisoners serving for a primarily sexual offence: 150.
That is 1 in 180,000 women currently in prison for a sexual offence.
So, a 137x difference in sexual offence rate on those numbers.
This also means that 95/245 = 39% of the group of "women+" (i.e. women plus trans-identifying-males-without-GRC) prisoners in for a sexual offence are trans women.
At all stages of the calculation, I've hedged in your favour (haven't adjusted for GRC-holders, used the lower number provided by the MoJ).
At what level does it become acceptable to be concerned about this?