Regarding the web farm servers in Azure, you have the max set to 3 servers to scale out to, correct? If Azure doesn't find a need to scale out, then Azure won't and you won't see those web farm servers in the web farm app in Xperience. But when it does, you'll see those servers in your web farm list in Xperience, like below.
When I talk about your license, I mean your Xperience license, not your license in Azure. Below is a v11 license example, non-mvc.