I think we'll find out they are MUCH, MUCH worse.
Especially when it comes to brain development.
Children are spending more time online than offline, making it increasingly challenging for them to differentiate between what is real and what is not (we see this in adults, too; remember the Qanon movement?). This cognitive dissonance is leading to more depression and anxiety.
Although there are a lot of factors here, I think the root cause (in addition to poor parenting) is clear. It's social media.
Social media platforms have been weaponized with algorithms that study habits and vulnerabilities to generate engagement (at all cost). So kids, with their brains not fully developed, spend all day mindlessly scrolling through memes and videos that gradually erode their cognitive abilities, alter their thoughts, and change their behavior. Prolonged exposure to this brain-rotting sensory overload shit distorts their perception of reality and diminishes intelligence. Test scores are waaaaay down, and I think we are just seeing the tip of the iceberg here.
We should have been more concerned when kids were eating Tide Pods or killing each other because of Slender Man. These were warning signs that we all ignored.
***UPDATE***
On June 17, Surgeon general calls for social media warning labels [link]. Nice to see at least something being done... although it might be too little too late.