@neil yes, it can be hard to make the link. And easy to assume detrimental effects by older generations witnessing big social changes in younger generations.
Anecdotally, I see my niece does not wanna go outside (hard to read screen in the sun), does not play with nieces/nephews at a birthday (friends are 'in the phone'). And it is hard to keep a conversation going, as the phone demands attention after a while.
Easy to get worried about that as a parent. But how is it impacting mental health?