Covid WFH is a real issue for our new developers. Especially the ones who are fresh out of college. They're missing out on so much institutional knowledge transfer. Especially the kind of monkey-see-monkey-do experience you need to build confidence using tools such as git. They're also hesitant to ping coworkers and ask for screen sharing time because they can't sense if the more senior developers are working on some…
There are many situations in which synchronous feedback won't be possible, wfh or not. For example, when the coworker in question is in a meeting or on vacation. All developers must be able to handle this situation and avoid blockages by switching to another task or an unblocked portion of the same task. The sooner new devs learn to juggle their time and attention in this way, the better.