Sorry, I don't understand what you're seeing here - you're creating a new project in Azure DevOps? When you do this, you get the choice between Git (hosted in Azure Repos) or centralized version control (TFVC hosted in Azure Repos). We don't have an option to do anything with GitHub here.
So I think that I'm not understanding what you're creating, or where. Can you drop me an email with a screenshot? It's my HN username @microsoft.com. Thanks!