even in the cis world, its completely normal to call a woman a girl, i hear it all the time, my mom just talked about "a girl, who is around 50, she died" and I am thinking.. why are you calling her a girl.
men on the other hand, they are only boys for so long, usually around 0-15 years old, after that they are called "guys" or "men" it seems derogatory for any older guy to be called a boy