Current recommended use of HttpClient is defined in this document.
One should not create a new HttpClient for each request, neither should one use a single HttpClient for the entire application. Instead, the DI system should be used to receive an HttpClient, either directly or indirectly, depending on use and configuration.
I have not used MADE.NET, so I do not know the best way to suggest the proper use of HttpClient, but documentation should be updated to reflect modern recommended practices.