Build a UWP app in c# with scripting backend IL2CPP

I have done a UWP project which is written XAML and C#. There I have added a Unity Scene part using the .NET scripting backend. The .NET scripting backend seems to deprecate soon, I understood that latest version of Unity only support il2cpp for UWP. I tried to build with IL2CPP. Unity generates a c++ Windows Store 10 project called Il2cppOutputProject and a c++ UWP application with XAML controls.

How can I used the Il2cppOutputProject generated by Unity into a c# UWP application? I used this example "https://github.com/TautvydasZilys/unity-uwp-il2cpp-with-csharp-project-example" to find a solution . But I couldn't solve it. So, can anyone help me with the procedure of integrating UWP C# app and unity IL2CPP project ?