As is sitting in an area and seeing who everyone goes to ask questions, and even overhearing the discussions.
So someone can learn how to phrase questions, what are useful types of questions to ask, what types of questions get someone told to ‘do their own research’ vs gets in-depth help, etc.
For a junior, that is very valuable because they often literally don’t even know where to start.
For someone with more experience, they often either already know all these things, or know how to find them out pretty quickly even without the help of watching what is happening, yeah?
I always maneuver myself into such a place that I have something to work on for myself.
Not all offices are like that, though! It takes some awareness & outgoingness from leaders and experienced folks, but it is possible to cultivate a socially engaging remote work environment. At my current employer, there seem to be two ingredients: 1) management and mentors who will happily talk about stuff that isn't work-related, and 2) an annual retreat where you do get to meet all of your coworkers in-person, in an environment where bonding is the main purpose.