https://arstechnica.com/gadgets/2024/01/ios-17-3-adds-multiple-features-originally-planned-for-ios-17/

Apple yesterday released iOS and iPadOS 17.3 as well as watchOS 10.3, tvOS 17.3, and macOS Sonoma 14.3 for all supported devices.

iOS 17.3 primarily adds collaborative playlists in Apple Music, and what Apple calls "Stolen Device Protection." Collaborative playlists have been on a bit of a journey; they were promised as part of iOS 17, then added in the beta of iOS 17.2, but removed before that update went live. Now they're finally reaching all users.