i feel like its generally the case. the longer youve been on hrt the more likely you are to be hard left. mostly because the longer the time youve been acting on being trans, the longer society has had to discriminate against you in some egregious way.
In my experience this depends on stealth vs not-stealth. The stealth people wanting to blend and capable of it tend to deradicalise because they can fit into existing society, those that can not tend to hyper-radicalise because they need society to change for them.