Can't Add NavMeshAgent Component

Hey there, I'm fairly new to Unity and have run into a problem that I have been unable to find an explanation for.

I'm trying to add a NavMeshAgent component to my RigidBody. My understanding is this is supposed to be found under Add Component > Navigation > NavMeshAgent, but in my editor there isn't even a Navigation section of the component dropdown. Searching doesn't find anything either.

Anyone have any ideas? I am using 2019.2.12f1

Also, not sure if this matters, but my nav mesh is building just fine.