Nothing new there.
It’s a shame though. A skirt is a wonderful thing; provides coverage when desired (warmth, cleanliness, even modesty} but allows easy access when needed (toilet, sex). And instant clue to a girls willingness or availability to mate, no show please leave me alone / a little show, well hello there!
Boys should be just as free to wear them.
What I really think is, if anything must be banned, ban underwear! School skirts are also in my attraction wheelhouse and few things thrill me more tha a glimpse of no undies bald pussy under a skirt!