That’s finally changing.
Related:Apple’s iMessage Is Secure …
Some data, like Health information and passwords in Keychain, are already end-to-end encrypted.
Justin Duino / How-To Geek
The main exceptions to full encryption right now are iCloud Mail, Contacts, and Calendar.
Many people use iCloud Mail withthird-party mail clients, which would need additional software or keys to continue functioning.
If you’re concerned about that,Protonis the most popular alternative.
Apple