> If you're using iOS 12 or later and have turned on two-factor authentication for your Apple ID, health records are encrypted using end-to-end encryption through iCloud. This means only you can access this information, and only on devices where you’re signed in to iCloud. No one else, not even Apple, can access end-to-end encrypted information.
https://support.apple.com/en-us/HT209519
> If you're using iOS 12 or later and have turned on two-factor authentication for your Apple ID, health records are encrypted using end-to-end encryption through iCloud. This means only you can access this information, and only on devices where you’re signed in to iCloud. No one else, not even Apple, can access end-to-end encrypted information.