When stored in iCloud backup, Messages is backed up with a copy of the on-device key. [0] This is what I meant by "insecure". Backing up locally (to iTunes) is

When stored in iCloud backup, Messages is backed up with a copy of the on-device key. [0] This is what I meant by "insecure". Backing up locally (to iTunes) is not recommended in the OP and does not resolve the Activity and Health GPS issue with iOS 14 and watchOS 7. [0] https://support.apple.com/en-us/HT202303 https://support.apple.com/en-us/HT202303