Trans women, in my opinion, are female in gender but male in biological sex...unless they've had hormone therapy & surgery, then they're part male & part female biologically (kinda...it's complicated). So you have people who express themselves as feminine and say they are women, but their biology, including nudy parts, can be male or partly male at the very least.
So now we have a big conundrum now don't we! Personally I don't know what to make of it all yet.
This will be controversial, but as of now my opinion is that trans women are not men, and aren't women. They're trans women. They are unique in that sense and should be respected as equal but different. For instance, I don't agree with trans women competing in sports with biological women because they aren't the same, their biology is completely different, as I said male vs female. Why not have their own category of events, i'd root for them!