Nextrcloud offline folder new documents sync


i have installed nexcloud, version 18.0.7.
Shared soms folders, works fine.

Bot sync is not what i hoped t would be? In net nextcloud app (ios / android) i can maken a folder offline available. When uploading from mobile device to nextcloud i get the green sing and its offline synced.
When i add on the server something its not synchronized to the app on the mobile device?!

I need to open (download) every document so its offline available.
Is there a trick to automate this?


I have a look a like problem. Using nextcloud to open smb shares to iOS devices. But devices report a code of 200 for some files on subfolders when making a folder offline available.
Get you fixed this?