It is simple. Just start a video call. With the following etiquette: Anyone can call anyone during office hours for any reason they would classically pop in.

It is simple. Just start a video call. With the following etiquette: Anyone can call anyone during office hours for any reason they would classically pop in. Anyone receiving such a call is entitled to ignore it. This has an additional advantage over the physical office: by declining the call you don’t get cognitively interrupted. With the popin the person starts talking about accounts API and the context switch has been forced on you. Unless you dispense with politeness in the physical office, but that is a lot harder to do. Maybe impossible without some team building role play training.