Oh, no, that's so the last decade! Or before!
That's what I wear and my students told me I wear old-lady clothes xD
Because I wear plain jeans and plain t-shirts.
At least here (not sure other places) now girls wear sport clothes. Fancy tracksuits.
Often the sweatshirt is cropped, so they can show their bellies.
For the bottom they sometimes choose leggins. Which is something I would only wear under a camisole or something that cover my rear, but I'm an old-lady.
Those who are not into the sportive clothing may wear jeans, but of course with a cropped belly-showing shirt or hoodie or somethig.
Also very very short skits with very very small tops. That works too.
See this:
https://www.aliexpress.com/item/32791450095.html
Nothing too awful, if you ask me.
I disliked female thongs and male boxers showing up, this is ok.
@Li Li:
No pjs. But yes to constantly staring into their smartphones.