[Maakuth]

I'm not iOS user myself, but I hear Möbius sync (https://apps.apple.com/us/app/möbius-sync/id1539203216) is reasonably good Syncthing client wrapper for it.

[willis936]

I could never get mobius to behave as I wanted.

I host nextcloud and use strongbox. Nextcloud supports WebDAV and strongbox works well with syncing through that.