There is problem when trying to check this type of Windows 10 app into Windows Store,
using the Packaging MSIX apps - MSIX | Microsoft Learn
The app built with the Xbox will ONLY be supported from the MICROSOFT_UWP_UNREAL in UWP64
The Unreal 4 UWP32 MICROSOFT_UWP_UNREAL needed for Holographic and cannot be entered to Windows Store.
Upload app packages - Windows apps | Microsoft Learn explains the problems
The offline versions will install but will **NOT **meet the packaging requirements for the Store