A couple teams I know even have a standing rule about everyone calling in individually on team calls even if a few people are in the same office.
I think a lot of people come at this from the perspective of small companies where everyone is co-located. But the reality at large companies if people are pretty scattered around even if they're not working from home.
Of course, this is my opinion, but it seems pretty obvious that in-person interaction is what builds relationships.
Also, haven’t you ever made friends online? Building relationships online is nothing new. In fact, many of the in person relationship building activities excluded different individuals. For example, going out for drinks with the team was never my idea of having fun. I am glad I don’t have to attend those anymore.