I'm an infant school teacher and the increased amount of speech and language delays and difficulties in children are I believe are in part directly related to screens.
I don't think it's the screens then, but instead, what's on the screens perhaps?
My eldest got a special prize in class once because he could name all the shapes up to something like 20 (I don't know them myself) - he knew them because he used to watch a youtube video that sang them. This is also how he learned the alphabet. My youngest can bake a perfect swiss roll - he didn't learn that from me, but from researching various recipes on the internet and yes watching youtube videos.
I've had very tricky conversations in the car at work about the various situations around the world, because they'd heard about them on the youtube channels they watch. The other day, we went hunting around the asian food stores for somewhere with sugar cane, because they'd seen it on a vid, and wanted to try it. It's now sat in a grow box (learned about on facebook shorts) setting down roots, and we'll try to grow it. My eldest uses language and maths videos to revise for his exams. He was choosing his youtube videos (he like videos of real-life trains, or educational, youngest always preferred cats or food).
The internet is a fantastic resource - dismissing it all as 'dancing fruit' is the problem here, just as it would be if you sat your kids down in front of TV continuously, if you sit them down in front of Netflix it's going to be an issue - let them choose their interests, join in and talk to them about them (yes, even when they're toddlers) and it's a whole different story.
Just like if you only gave kids books with Spot the Dog and never showed them anything else.