Great question. During the COVID situation, many schools have migrated to Zoom lectures. Zoom is a toolset; it is not a universal solution for education. In fact, using Zoom to do something it is not meant to do can make the students’ experience worse than without it.
Remote education via Zoom (or similar platform) does NOT generally work well with early primary age students. Zoom education calls that are meant to replace in- class lectures, where there is generally disruption in the class, will still have that disruption, making that online lecture problematic at best.
Zoom calls that are used in a classroom environment where the in-person education experience does NOT have a lot of interaction with students will be very problematic when done in a remote scenario. Attention from the students will simply not be there.
On the other hand, I am at most working with a limited number of students when I am interacting remotely. My sessions are VERY interactional. Some of my lessons are meant as primarily teaching lessons. However, most of my sessions are problem-solving sessions requiring a high degree of interaction. I extensively use the shared desktop functions of these tools to work with the student to understand the problems, as well as my drawing pad notebook to work through problems together.
Given the ability to work effectively with students remotely, there is no real geographical limits. International tutoring can easily be accomplished. In fact, I have looked into doing international family tutoring for families that might travel for extended periods of time and would need support while away from their home schools.