You don't see many trans people in the main circuit partly because of skill and partly because of politics. There are definitely some trans GC players that could hang in the main circuit, but 99% of vct teams are not willing to take the risk associated with having a trans player for them to just "hang". Flor got a chance because she was head and shoulders above most players, and even she didn't get a real fair shot (albeit the controversy probably didn't help). The only way I can see a trans player getting a chance on the main circuit is if their mechanical skill is overwhelming, similar to Flor.