The com.apple.MobileAsset.UARP.A2618
MobileAsset type contains firmware updates for AirPods Pro (2nd generation).
It's published in mesu for iOS (manifest) and macOS (manifest).
The manifest was first published on 22 September 2022 , when the first firmware update was released.
For the release history of AirPods Pro (2nd generation) firmware updates, see the OTA Updates/AirPods Pro (2nd generation) page.