By default, WhatsApp chats are end-to-end encrypted, but the backups aren’t encrypted for iPhone users. To be on the safe side, you can enable end-to-end encryption for those WhatsApp backups. Here’s how.
Until recently, WhatsApp chat backups on third-party cloud platforms were not end-to-end encrypted. WhatsApp users can disconnect and delete their chat backups from Google Drive.
WhatsApp has officially announced end-to-end encryption for chat backups on Android and iOS, and the feature is now live. The chat backups will also be encrypted and will be inaccessible to Facebook and its associated platforms.