Very nice! Thanks for your work!
I'd like to suggest adding an icon to show the sync status of the note, either "synced", "currently syncing" or "not yet synced". The idea is to inform the user if their work is correctly saved in the cloud.
This would be especially important on mobile, since the sync status isn't visible while editing a note (you have to press back 3-4 times to see it). And it's important for users to see the status of the sync, since phones usually won't sync if the user closes the app or puts the device to sleep, causing sync conflicts between devices.
You can see a crude mockup that I made some time ago: Mobile: Display sync status while in edit view
You can take inspiration from Google Docs and other similar apps, which display a cloud icon with a checkmark when the current document is properly saved in the cloud.