I do not believe you.
It matters not at all when they transitioned. Male bone structure is Male bone structure. The pelvis doesnt alter despite any drugs and as yet there is no operation to change the pelvis.
See a certain young cyclist. See a Florida born transwoman who was very young on the drugs, had surgery young, does not have a female gait.
If the male pelvis cannot be changed, neither can the female pelvis. I dont know how many times we need to say it, we can tell men, therefore we can tell women.
Plus hands, feet, voice, other things that are little tells that show when someone is a man or woman.
Plus until very recently aside from the vanishingly few trans women our spaces were single sex and I dont recall one instance of a masculine looking woman being harassed for wanting to use single sex womens spaces.
Now of course it's a free for all and they might get asked. Well if it went back to being single sex (no trans women anymore) we wouldnt need to ask. We would know only women would be in there.