Apple has released iOS 17.6.1, an update that addresses a bug affecting iCloud's Advanced Data Protection feature. This update ensures the highest level of cloud data security for users, providing end-to-end encryption for most iCloud data, including backups and photos. To download the update, go to Settings > General > Software Update.

Source: https://www.cnet.com/tech/services-and-software/you-should-download-ios-17-6-1-now-to-ensure-this-feature-works-correctly/#ftag=CAD590a51e