I wouldn’t loop backups into that criteria. iMessage syncs your message history to all of your devices in an end to end encrypted way: https://support.apple.com

I wouldn’t loop backups into that criteria. iMessage syncs your message history to all of your devices in an end to end encrypted way: https://support.apple.com/en-us/HT202303 https://support.apple.com/en-us/HT202303 and WhatsApp allows user to backup/restore their messages with iCloud (unencrypted)