From broad brain traits like sexual orientation down to smaller ones like spatial perception or emotional intelligence, a young brain has certain development windows in which a trait or ability can get more or less developed. You could even add in personality traits like competitevness or deference once you associate it with a gender role.

With "female brain structure" i mean traits that are commonly overrepresented in what you might see as a regular woman. I know its inaccurate but so is the opposite, by saying there are only 2 genders and men are all men. Gender is a spectrum in many dimensions and my example of male physique and female brain structure is just a simple counter example against this.