[Level Design] How to apply world partition about large static mesh?

I want to create disc-shaped terrain and create planetary levels appropriate for Side Scrolls. This is roughly what it looks like.

The basic level editor of UE5 or the free version of Voxel Plugin did not create this type of terrain. Therefore, I would like to create disc-shaped terrain using 3D modeling tools such as Blender and import it into Unreal Engine. There is no difficulty in this method.
But what I’m curious about is whether I can apply World Partition like Landscape and activate optimization based on space partitioning. If anyone knows how, please let me know.

I think World Partition currently only works based on X Y coordinates. Any kind of verticality would be in the same partition. Maybe you could put the circle sideways though.