A real problem is that many teachers blame everything on the phone and are like: Well, would like to help, but that kid is too much on the phone. Often, they are not. Often, the ADHD and need for more stimulation causes the use of the phone, not (only) the other way round. They even make up weird shit, like several 7 year olds have been accused of playing / watching Squid Game, which is really, really unlikely. I believe the actual number is 0. Seems to be the result of suggestive questioning, especially since it's always Squid Game.

It's complicated. Apps that are designed to milk or dopamine can cause symptoms that have some overlap with ADHD, and for even neurologically similar reasons. But having ADHD can also make it more attractive to be on the phone while doing other things in order to reach the comfortable level of stimulation.