An additional one I noticed with my female cousins was that a lot of fun was sucked out of high school girls' social expression/reconnaissance.
On the recon side, gossiping is a fun bonding activity, but scrolling through snaps/reels is relative drudgery.
On the performance side, "be pretty and vivacious at fun social events" is no longer sufficient without obsessively managing your profile's brand. This doesn't only include posing for, curating, and editing photos, but a bunch of arcane rules about tagging etiquette, who's included in your photos, etc.
This is all from the horse's mouth, with a little bit of editorializing. The social environment of an in-crowd high school girl has always been extremely intense, but these tools hage made the process simultaneously more work and less fun, to hear my cousins tell it.