I hope you realize that what mostly (overwhelmingly) happens to trans women in male prisons is that they get raped. Either violently or by blackmail in exchange for "safety." Tons of data exists about that. You should google it and try to understand. The scenario you present -- trans women abusing other women in prison -- is vanishingly rare. Any woman who abuses another woman in prison (or appears likely to) should be removed from general population. That's an actual solution to an almost-unmeasurable phenomenon. And, in case you didn't know, the vast majority of trans women have serum testosterone levels on par with other women.