Apple today released the 2nd Public Beta update for iOS / iPadOS 16.3 for public testers. Evaluation typically releases a Public Beta update 1 day after the release of a Beta update for developers. This update comes 1 month after the last Public Beta.
So far, the updates for iOS 16.3 and iPadOS 16.3 appear to be smaller than the iOS 16.2 and iPadOS 16.2 releases. It adds support for physical security keys that add an extra layer of protection to Apple IDs. With this feature, a physical FIDO-authenticated security key can be used instead of device authentication when signing into your Apple ID on iCloud or a new device. The update also simplifies the process of transferring songs between iPhone and HomePod.