If you're going to blame screens, then how COVID lockdowns sped up how reliant schools and pretty much every other institution became reliant on screens should factor into the on-going impact of those lockdowns.
Pre-COVID, my kids had one desktop computer that was attached to a TV for all their school needs. It worked really well, even the secondary age kids didn't really need it for long in any day, they could easily rotate. Then COVID hit, 3 out of 4 of my kids were expected to be on a computer for hours a day for all of their lessons. This repeated and increased with each lockdown - first only one had online live lessons, but the others had a lot to do, second time all three had online live lessons. There is still a significant increase in AI-generated homework and computer use in general compared to pre-pandemic. While it absolutely existed before, it has dramatically increased the idea that kids should be able to teach themselves anything if they have access to the internet without adult input, and that's educational neglect. That's having far more of an impact I think than just gaming, which has been around for decades.
Then there was my oldest, who was going though a practice paper with his dad when the announcement came that exams were cancelled. He burst into tears, feeling so lost - GCSEs were built up by the school as the key to his future and for weeks he had no idea what was happening. His school was actually really good at getting lessons back straight away, but they had nothing they could tell the kids either. I remember so many adults afterwards, especially online, were telling teenagers who were upset that they were monsters, that they were heartless, that those exams that schools had been pumping up for years as pivotal to their lives, those suddenly didn't really matter, they should be glad to have time at home.
I remember my oldest in an online English lesson going over that poem that was everywhere about how great lockdown is as we all have more time, he and his peers tore it a new one as they all at least one parent who was out working, many doing longer shifts to cover for others. Instead of the quiet the poem talked about, they talked about hearing more trains and freight lorries. The teacher was really good with it, but that's where my thoughts go back to - those kids, and many of us adults, were being pushed a narrative of how we should view the lockdowns that didn't match reality and told if they felt anything negative then that meant they wanted people to die. It was a massive headfuck for some.
Yes, he and the others have had time to rebuild since, that doesn't change that the lessons learned and how education and other parts of society that have changed doesn't have a lasting impact. As others have said, the whole discussion around the importance of attendance and schools is in tatters, trust in general seems very low, and those COVID cohorts are now adults dealing with a horrible job market, rising cost of living, and many are still in very unstable situations where they're hearing again that it doesn't matter how they work, they're going to be considered the problem and should just be grateful for whatever. It's not unsurprising that many of them are struggling emotionally, if not in many other ways.