The com.apple.MobileAsset.MobileAccessoryUpdate.A3184-24E.EA
MobileAsset type contains firmware updates for AirPods Max (USB-C).
It's published in mesu for iOS (manifest) and macOS (manifest).
The manifest was first published by 31 March 2025 , around when the first firmware update was released.
For the release history of AirPods Max firmware updates, see the OTA Updates/AirPods Max page.
This is a newer asset of (com.apple.MobileAsset.MobileAccessoryUpdate.A3184.EA) that was only to be supported with iOS 18.4 and macOS 15.4 and newer, but this appears to have not been implemented on the iOS/macOS side in /System/Library/PrivateFrameworks/MobileAccessoryUpdater.framework/XPCServices/UARPUpdaterServiceLegacyAudio.xpc/Contents/MacOS/UARPUpdaterServiceLegacyAudio
.[1]
As a result, com.apple.MobileAsset.MobileAccessoryUpdate.A3184.EA was published on 2 April 2025 with a slightly newer firmware version.