The com.apple.MobileAsset.UARP.A3085
MobileAsset type contains firmware updates for Apple Pencil (USB-C).
It's published in mesu for iOS (manifest) and macOS (manifest).
The manifest was first published on 14 November 2023 , when the first firmware update was released.
For the release history of Apple Pencil (USB-C) firmware updates, see the OTA Updates/Apple Pencil (USB-C) page.