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.
Enable End-to-End Encryption for Your iCloud Backups
Apple's Advanced Data Protection for iCloud feature uses end-to-end encryption to provide the highest level of cloud data security that Apple offers. Here's everything you need to know about enabling it on your devices. The encrypted security feature gives you the choice to further protect your...
It appears end-to-end encryption is now supported on the latest versions of macOS/iOS/iPadOS.