The com.apple.MobileAsset.UARP.A3056
MobileAsset type contains firmware updates for AirPods 4 with Active Noise Cancellation.
It's published in mesu for iOS (manifest) and macOS (manifest).
The manifest was first published on 18 September 2024 , when the first firmware update was released.
For the release history of AirPods 4 firmware updates, see the OTA Updates/AirPods 4 page.