@kugiigi ok ! I was not aware about this "hidden" detail, it's confusing.
For me Nextcloud account sync means obviously Contacts and Calendar + optional features (trough this sync or through specific apps).
Now I really understand te reason of his thread and agree with the fact that when you leave iOS or Android for Ubuntu Touch, you expect to have self hosted sync or alternative sync, although it is good to see Google sync.
Contact sync is a very important feature, I hope it will be implemented.