From my further investigation, I checked preinstalled "Windows (store) app" in IMX8M Windows 10 IoT core, by using administrator account of PowerShell, explained below link.
https://docs.microsoft.com/en-us/windows/application-management/provisioned-apps-windows-client-os#u...
I first tested in my Windows PC and found:
- Microsoft.DesktopAppInstaller Microsoft.DesktopAppInstaller_2022.728.1939.0_neutral_~_8wekyb3d8...
- Microsoft.WindowsStore Microsoft.WindowsStore_22207.1401.1.0_neutral_~_8wekyb3d8bbwe
but there is no such apps included in IMX8M Windows result (below).

The only package "Microsoft.MicrosoftEdge.Stable" may be installed by Windows Update.
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I believe some of the Windows (Store) app should be preinstalled in OOBE phase. But current BSP install script appears no apps to place, so that some of the user's UWP apps can't always duplicate the standard Desktop Windows experience.