I promise you kids have been forming groups and have had feelings of exclusion that existed well before online games. The root cause here wouldn’t be online games in of themselves.
And for the record, I do strongly dislike gaming, surrounding culture and how gamers act when they play more then a little. It just was not my topic now, topic was suicides in covid.
2.) It is not socialization with active voice chat. That is more like writing letter or something like that. It will do less to make your brain feel like you have social connection.
The thing that is supposed to make difference (according to psychologist that had talk about social isolation) is talking. People who call have similar psychological results as those heavily socialized. if you write mails a lot, you reassemble lonely people more.
It does not matter what are reasons for disparity. But, the boys were more likely to continue some unchanged socialization ad they had before. They already had established groups to play with and so on.