How can I edit meshes within an InstancedFoliageActor or move the foliage meshes back to the landscape?

I have project I’m messing around with.

What I think I know about instances is that they’re cached references for faster loading.
I understand material instances but not instanced actors or foliage.

What I would like to know is how InstanceFoliageActors are created and how they relate to procedural volumes.

What I need to know is if there is any way to edit individual meshes within an InstancedFoliageActor or if there is any way get the foliage back to the landscape actor.