Yes, it does work with Nextcloud - and this is the reason I moved to Nexcloud from Syncthing (and previously - Seafile).

I was just commenting on your migration to Syncthing, which is a superior syncing app IMHO. It is just that when I was using it I realized that I am missing the share ability, which is avalable in Nextcloud, though my (somehow unhappy) travel the other way round from Syncthing to Nextcloud.

I think that Nextcloud is trying to cover too much things, with half-baked apps.