Essentially every high schooler had an active Facebook account and essentially every school paper was written on a word processor by, like, 2010. By 2018 even Instagram is starting to be played out. I would be very surprised to see a material increase in the share of US or western students using social media over the 2018-2022 period.
I don't know for kids specifically but average user time: 2012 1:30 2016 2:08 2019-now ~2:30
If child patterns match the average, an average 8th grader from now has accumulated something like 30% more than one in 2018.
If only we knew what could possible have happened right in that time period to really throw a wrench in the works of the education system...
You say this as if 2010 Facebook was comparable to 2022 Instagram/TikTok.