How to create Web application using Xamarin Forms(UWP) and C# in visual studio 2019

I want to create a web application using Xamarin forms and c#. I am using .NET core 3.1 architecture. I am completely new to both these technologies.
I am not sure If we can create Web application UI using Xamarin forms(UWP). I saw several posts where only android, ios and windows mobile Applications are created using Xamarin but Is it possible to create UI for Desktop? I created few web pages and tried to run the project and all I see is "welcome to Xamarin!" screen. Why I am not able to see the UI ?enter image description here