It's amazing how little integration of online tooling there is even in the thought process. The fact that they are remote or not actually says little about the

It's amazing how little integration of online tooling there is even in the thought process. The fact that they are remote or not actually says little about the communication patterns except that it is not physically face-to-face. If mentorship is important then rather than relying on the physical distance between the new person's desk and the senior, you make it a policy that they need to do mentorship. And provide tools, structure and time for that. If the senior or junior by virtue of the fact that they are not sitting in the same space cannot or will not work together, then either you have not got the tooling in place or you don't have control over your employees. Learn to use internet software, set firm policies about communication and collaboration and availability to the degree it is actually necessary. If people don't comply then fire them. The fact that they are physically in the same space or not is a minor detail for most of these jobs. Absolutely incredible how little understanding there is of that fact. Learn to use an online white board, screen share, write an email, or open a video or voice chat.