Calling C# native Winrt APIs from WebView2 in WinAppSDK

I followed these links(https://learn.microsoft.com/en-us/microsoft-edge/webview2/how-to/winrt-from-js?tabs=winui2%2Cwinrtcsharp
https://github.com/MicrosoftEdge/WebView2Samples/compare/uwp-wv2winrt-custom-csharp-winrt) and tried to create the same for WinUI3(WinAppSDK) instead of UWP.

As part of this, below steps are followed.

1. Created a WinAppSDK winUI3 blank app(MyWinAppSDK)
2. Created a C++ winRT(Universal Windows) component(NativeAdapter) and configured the wv2winrt tool
3. Created a C# Winrt(UniversalWindows) library (Native Code) which has all my Native APIs

Here, NativeAdapter has a reference to NativeCode project which has C# APIs and
MyWinAppSDK project has a reference to NativeAdapter which has the following properties set

Finally when trying to build MyWinAppSDK project getting the below error:

NU1201 Project NativeCode is not compatible with net6.0-windows10.0.19041 (.NETCoreApp,Version=v6.0). Project NativeCode supports: uap10.0.17763 (UAP,Version=v10.0.17763)

Kindly guide me with the above issue and it would be helpful if there are any working samples for C# APIs getting called from WebView2 code in WinUI3?