None of those studies isolate peer interaction. As such they are a valid indication of the effect of school closures but the event is multivariate and you can d

None of those studies isolate peer interaction. As such they are a valid indication of the effect of school closures but the event is multivariate and you can draw no conclusions about the peer interaction effects directly. It amounts to "The experts say peer interaction is important so that must be one of the variables at play here" But the actual research some of which I cite in my sibling comment indicates the opposite.