iOS 17.3: All new features
Stolen Device Protection
This new feature will be adding a slew of protection layers to iOS which will make it harder for wrongdoers to change essential security settings. Enabling the feature will require a positive biometric authentication when you’re attempting to change your iCloud password, turn off Lost Mode, or erase an iPhone when at an unfamiliar location.
This is done so that thieves who have somehow obtained both your iPhone and your passcode can’t completely lock you out of your device.
Enabling Stolen Device Protection is as simple as flipping a switch by going to Settings > Face ID & Passcode and flicking the respective switch to enable Stolen Device Protection. Disabling it, however, logically requires a successful Face ID authentication, so that even if the thieves are familiar with the new feature, they wouldn’t be able to disable it.
Collaborative playlists on Apple Music
Collaborative playlists that allow multiple people to edit public Apple Music playlists is missing from the official iOS 17.2 release, having been promised as a new feature. However, the first iOS 17.3 beta includes the upcoming Apple Music functionality and will hopefully this time make it to the final release. The ill-fated iOS 17.3 beta 2 also featured collaborative playlists, indicating that these are on their merry way.