The effects of the pandemic on children has definitely been variable. Higher income kids going to private schools are back in school by 6 months, while lower income kid's public schools cannot even get zoom classes organized or access to such classes (laptops, etc) for over a year in some places. Average that out and the overall net effect has probably not been great.

Demand for mental health care during the pandemic has boomed, and the isolation of lockdown and all the other stresses are directly correlated to that.

Strawman fallacy.

appeal to incredulity. bravo!