But if you look at mine, there’s no references whatsoever.
I’ve tried highlighting the namespace, right-clicked, selected “Find All References”, and it won’t show much of anything. Plus there’s no “Add Reference” option.
Your project is a .NET core project while Mosh’s is a .NET Framework project. .NET core projects have a “Dependencies” category that is a little bit more structured but does basically the same as the “References” category in .NET Framework projects. If you drill down the “Dependencies” tree you will see that the references there have the same icons as the references in Mosh’s project.