Everything except specifically iCloud Mail, Contacts, and Calendar is E2EE when Advanced Data Protection is enabled. See this for what is and isn't encrypted:

Everything except specifically iCloud Mail, Contacts, and Calendar is E2EE when Advanced Data Protection is enabled. See this for what is and isn't encrypted: https://support.apple.com/en-us/HT202303 https://support.apple.com/en-us/HT202303