It also heavily depends on what hormones if any the transgender woman is on. Monotherapy increases estrogen count well above cis female levels, and both monotherapy and via T blockers reduce testosterone so drastically that agab has absolutely no role in overall strength. I had moderate muscle mass and a very lean build before transitioning (from amateur climbing and track), and quickly lost all of that within four months on monotherapy even with regular gym attendance. My leg strength stayed about the same but overall build and gains are exactly on par with my cisgender peers now. The point being I’m not sure one can even argue that they could train on natural T before transitioning to gain an advantage, as maintaining that muscle mass is near impossible. And if policing hormonal levels becomes a thing if low-dosage is a concern, then many cisgender women would also be barred for competing due to naturally high testosterone.