The iCloud has the iCloud Drive (a could storage where the user can store any files and which Apps can access and share) and files in an "UbiquityContainer", which will be synced and only accessible to the App itself, not visible/accessible to other Apps.
The information about the new Advanced Data Protection (ADP) only mentions iCloud Drive to be covered by ADP. Are the synced files within the UbiquityContainer also protected by ADP? If not, how can these be included?