blazor-components | Components collection and extensions for Blazor applications | Binary Executable Format library

To answer the question myself, this is the library which looks the most promising and it is also free.

I figured it out! To answer some of the questions and a reproducible example:

Create an empty MVC Core Application and follow Chrissianity's tutorial on how to implement Blazor to an existing MVC https://chrissainty.com/using-blazor-components-in-an-existing-mvc-application/

I didn't notice that I was using

From the docs: https://docs.microsoft.com/en-us/aspnet/core/host-and-deploy/blazor/index?view=aspnetcore-3.0&tabs=visual-studio#app-base-path

The app base path is the app's root URL path. Consider the following ASP.NET Core app and Blazor sub-app:

• The ASP.NET Core app is named MyApp:
  • The app physically resides at d:/MyApp.
  • Requests are received at https://www.contoso.com/{MYAPP RESOURCE}.
• A Blazor app named CoolApp is a sub-app of MyApp:
  • The sub-app physically resides at d:/MyApp/CoolApp.
  • Requests are received at https://www.contoso.com/CoolApp/{COOLAPP RESOURCE}.

Without specifying additional configuration for CoolApp, the sub-app in this scenario has no knowledge of where it resides on the server. For example, the app can't construct correct relative URLs to its resources without knowing that it resides at the relative URL path /CoolApp/.

To provide configuration for the Blazor app's base path of https://www.contoso.com/CoolApp/, the tag's href attribute is set to the relative root path in the Pages/_Host.cshtml file (Blazor Server) or wwwroot/index.html file (Blazor WebAssembly):