It's basically all anecdotal, like most management principles. But there does seem to be a number of managers across the tech industry concluding that in-person work is more effective, that the covid period of remote work was an experiment that did not work.

This isn't an opinion shared by everyone, which in my opinion is a good thing. Some people prefer all-remote teams, some people prefer a mix, and some prefer to work on teams where remote work is not allowed. I think everyone should find a workplace that is suited to what they want.