Locations>icloud(Icloudkit)> next screen> pick the databases
The databases to pick only appear if you synced them on mac earlier
That’s what I have set up.
Oops - answered before I saw your second message
Taking a look
i would suggest you try to sync your global inbox first. once that is in sync, worry about the databases. don’t start with a 11gb database, way too big to play around with.
also, the dbs from your mac will only show up as a sync-option on your ipad if it is fully synced on the mac.