broke
You'd complain if she was in a female jail and since she's not (which is presumably what you want) you're complaining that someone online disagrees with you.
If someone on twitter with an alternative view triggers you so much, you must literally spend literally all day clutching pearls.
And no, a male prison wing isn't the best place for someone with a pair of titties either, one reason why there are increasingly special facilities
But of course since for you, someone trans can't do wrong for doing right and no response by society that doesn't lead to if not their painful and gruesome deaths burnt as witches at the stake then at least them being cast out for permanent exclusion (reported in tabloids and cackled about by menopausal terfs on twitter), I doubt anything would satisfy you except going back in time to a period when there were so few people outside the gender binary that you'd have to find something else to moan about.
And you or someone else will probably mean about the cost of a special unit, despite the coast probably being a fraction of the ad revenue from the clickbait articles about difficult prisoners and the issues of housing them with8n the prison service estate.
and has gone on a hunger strike
Prisoners want all sorts of things, yet 99.999% of their personal elands don't end up online. They are by nature often very difficult people, regardless of gender.
At least nobody's mentioned that exhibitionist from Ireland and his grandstanding. Doubtless someone will find it in their internet hate searching.
has lots of captive targets....
Extremely violent criminals are rarely nice and the level of violence among inmates can be shockingly high including prison rapes and in women's prisons, other sexual assaults. You prefer though to fixate on potential crimes since I'm not aware of any suggestion that the prisoner you mentioned has committed any crimes whilst inside.
Perhaps you should trust the prison service (in a country which like 'novichok, you've never been in yet never fail to scour the internet for articles about) to do their job, which right now you don't seem happy they're doing in a way which one would think you'd actually approve of.