Jonathan Haidt would argue that their coping mechanisms are not as well developed due to less unstructured play time (conflict resolution without appealing to an adult).
I'd agree with that assessment and go further. Their ability to manage basic self-care is impaired. I hesitate to use my generation (Gen X) as an example, because I think we were on an extreme of borderline neglect, but there's something about Gen Z/alpha that just screams borderline abuse on the other end of that spectrum.