Thanks to your feature request, I think I found a better solution for making mobile sync easier (other than background sync). That would be refactoring the sync button to display in the sidebar or the toolbar, as in:
- Mobile: Add sync status icon by personalizedrefrigerator · Pull Request #6824 · laurent22/joplin · GitHub
- Mobile: Display sync status while in edit view - Features - Joplin Forum
A sync icon button in the toolbar saves needing to open the sidebar to sync notes. Icons would signal status in a less distracting way that is more colorblind-friendly.