Sync via Nextcloud client rather than Webdav

[ajay]

see this thread,

Is it possible to directly sync between two devices?

I'm trying to move my notes from one Android phone to another. However I don't have any kind of cloud service or online storage accounts that I use (or really any that I would trust enough to set up an account for these notes). If I have Joplin installed on both devices, is there any way to sync the note data directly from one to the other. Export and then import, or something like that with some syncing app? Can it be done if I physically connect them with a cable?

but no doubt speed is relative to the eye of the beholder,
switching from another one to opsone increased my syncs 5-10x,
how this compares to you, your country, your DSL, your router, your ... you may have to try. Good luck !