Ok, I’ll bite.
If a medical procedure could take a woman, change every cell, bone structure, organ size, musculature, dissolve some organs, grow other organs, so that physically and biologically that woman became indistinguishable from a man?
Then that person would biologically be a man.
However they still would not have been raised as a boy, socialised as a boy, treated as a boy/young man by the wider world, had the experiences of a boy who enters puberty, etc etc.
They would never be the same as a man who was born a man and raised as a man, and they should never try to tell men what “being a man” involves or is like or that all other men must immediately and unquestioningly accept them into their male spaces, groups designed specifically to support men, male friendship groups etc.
Compelled speech or requiring people to pretend that this person was always a man would also still be wrong.
So they’d be a biological man, for day to day purposes could live life “as a man” without most people noticing/caring that they have a different background.
But they still couldn’t and shouldn’t get away with all the shit that the TRAs are advocating for.
Also please stop imagining that you understand what the phrase “gender critical” means, you clearly don’t.