Can't add NavMeshSurface in editor

Unity Engine
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1

NavMeshSurface doesn’t appear as an addable component in the editor with the Add Component button on game objects in spite of being able to reference it in my code (Unity.AI.Navigation.NavMeshSurface). Is there a step I’m missing beyond installing the AI Navigation package?

2

Looks like it has to be created via the GameObject > AI >NavMesh Surface button.