Editor Ulitity API of World Partition

I’m building a very huge world in UE5.1 by python API. The map size is more than 500km*500km. With the support of Large World Coordinates, I think it’s workable.
The amount of actors spawned by Python is more than 1 million. I must first spawn some actors, then unload these actors, and then spawn the next batch of actors.
The question is I haven’t found any API to load and unload region of world partition. The only way is in UE Editor.
In other way, I found a blueprint class named WorldPartitionBlueprintLibrary, and some function like load_actors,unload_actors, but it apparently doesn’t work in editor.

My solution is using LocationVolume actor, and writing new API to spawn LocationVolume actor by cpp code.

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