This reply does not address parents question at all.
A key feature of Obsidian is that it stores your notes in an open folder structure on your file system.
A very valid question is whether there are benefits to using a special note sync application rather than a standard file system sync application, and if so, what those benefits are.
I've been using Synology Drive to sync Obsidian between different machines and my android phone and it works great. I've never seen a need to use the official sync.