These are known as drag kings, they're not so heard of because it looks like the norm to most and is not questioned (because they just look androgynous) just accepted.
Well, it is now, because women fought for the right to wear trousers - and actually plenty of women and girls still don't have that right in all circumstance.
All men and boys have to do is start wearing skirts more, and people will stop commenting on that too (much like no-one bats an eyelid at a scotsman in a kilt)
It does wind me up when people assume that women wearing trousers came easily. It was a fight.