I am a Senior SRE at a FAANG and part of my job is mentoring junior members on the team. In my experience being remote and having tools has made mentoring easier. Between slack and zoom they get to talk to me and I get to send them relevant info that they can look back on for reference.

Also in situations where I may need to show something to a couple people, I have the option to record it. This allows for others to watch who couldn't attend and it can be reference for new members.

When in the office, someone stopping by or having me come to their desk was awkward and there was usually no paper trail to reference.

If I were to go back to the office I would continue mentoring this way as the tools help facilitate the sessions better than sitting at their desk talking to them.