You might want to check out this...Does it protect it from Apple employees snooping? because my iCloud account has a password and I know for a fact Apple holds the keys to unlock my icloud account.
iCloud data security overview - Apple Support
iCloud uses strong security methods, employs strict policies to protect your information, and leads the industry in using privacy-preserving security technologies like end-to-end encryption for your data.
support.apple.com
How to Enable End-to-End Encryption for iCloud Backups
With the release of iOS 16.3 and macOS 13.2, Apple is introducing Advanced Protection for iCloud, which uses end-to-end encryption to provide...
www.macrumors.com
It appears end-to-end encryption is now supported on the latest versions of macOS/iOS/iPadOS.