If transgenderism was a real thing and not just gender dysphoria/mental illness, then 50% of these people would be females claiming to be males. I've read where there are far more males claiming to be females than females claiming to be males.
You can slice off a male penis making the mentally ill person look grotesquely like a female, but you can't add a penis to a female and make it look real. There's no way a female claiming to be a male can simulate a real penis. In fact I've never heard of that being attempted. Maybe I'm not reading enough about these mentally disturbed people.