Version 1.7 Experimental (1.7.0-experimental3) Error with Class not registered

Describe the bug

i wnat to try Latest experimental channel release notes for the Windows App SDK - Windows apps | Microsoft Learn

but i create new WinUI3 project ,and use nuget install "Micrisift.windowsAppSDK "

but when i try [Get started with Phi Silica in the Windows App SDK (https://learn.microsoft.com/en-us/windows/ai/apis/phi-silica) ,

while error at "if (!LanguageModel.IsAvailable())"

My HW info :

    Device name WOATARGET
    
    Processor Snapdragon(R) X Elite - X1E80100 - Qualcomm(R) Oryon(TM) CPU 3.42 GHz
    
    Installed RAM 16.0 GB (15.4 GB usable)
    
    Device ID 3BA38F3F-32C0-4DF7-876F-8BC8524BA6D9
    
    Product ID 00330-80000-00000-AA505
    
    System type 64-bit operating system, ARM-based processor
    
    Pen and touch Touch support with 10 touch points

Steps to reproduce the bug

1. creat new Blank App, Packaged (WinUI3 in Desktop)
2. Nuget install Micrisift.windowsAppSDK version 1.7.250127003-experiment3
3. use sample code at https://learn.microsoft.com/en-us/windows/ai/apis/text-recognition , https://learn.microsoft.com/en-us/windows/ai/apis/phi-silica or run this sample https://github.com/microsoft/WindowsAppSDK-Samples/tree/main/Samples/WindowsCopilotRuntime
4. always fail at 1.7.250127003-experiment3 SDK
   example :

Expected behavior

Run successfully

Screenshots

OS version :

NuGet package version

Windows App SDK 1.7 Experimental 3: 1.7.250127003-experimental3

Packaging type

Packaged (MSIX)

Windows version

Insider Build (xxxxx)

IDE

Visual Studio 2022

Additional context

No response

Start by reproducing the failure in the WindowsCopilotRuntime sample and the linked Phi Silica and text-recognition samples using Windows App SDK 1.7.250127003-experimental3. Check the exact exception at LanguageModel.IsAvailable() and compare the packaged WinUI 3 setup, ARM-based hardware, and Insider Windows build. Done means the sample runs without the “Class not registered” error or the required compatibility limitation is documented.