Is it the individual concerned or is it everyone else around them who has to label someone deviating from "normal" behaviour?
Everyone around them, obviously. Without any other people around, how would you even know what "normal" is and that your behaviour isn't it?
By now, it is pretty common that, despite all their babbling of "you are what you feel you are", transactivists tell women to get themselves to a doctor and take testosterone if said women dare to have short hair and not use make-up.
And before that, well, perhaps no one outright told people they must be trans, but gender non-conforming women did get the "oh, you look like a man" treatment pretty regularly. (And while I don't have personal experience of it, the "oh, your hair is so long, you look like a girl" young men got for having long hair is familiar)