I assume that in the next decade, COVID lockdown will be the prototypical “explanation” for why gen alpha is the way they are, whatever that happens to be. If the stereotype is that they’re all a bunch of weird introverts, that will be due to lockdown stunting their social skills. If they’re all a bunch of gregarious outgoing types that will be due to lockdown giving them a stronger yearning for socialization they were deprived of in youth.
Probably the discourse will be both of these at the same time, with people fighting with each other based solely on their impression of the last three teenagers they spoke to.