Adding filters with multiple contains

I am running through creating a full blazor CRM application. I am currently stuck on "Implement contacts search" => "Client-side WebAssembly Blazor" step 4 about "Adding filters with multiple contains".

Would it help to create a gif which documents how the filter with multiple contains was added?

Similarly on "Client-side WebAssembly Blazor", the application does not have Pages\Home.razor.cs page in the whole solution. What am I missing?

The source code of the application from this tutorial is here:

Thanks @enchev,
I opened the radzen => BlazorCRMWasm solution in radzen and I do not see a filter defined. Please see screenshot.

Do the applications in github match the "create complete application" quickstart?