Merging Actors with Python : Choosing a 'method'?

What I’m trying to do is replicate the “Batch” Method of merging actors through the UI.

Right now I’m able to create what appears to be an instanced static mesh actor using this:

import unreal
selected_actors = unreal.EditorLevelLibrary.get_selected_level_actors()
mergeOptions = unreal.MergeStaticMeshActorsOptions(True, ‘newActorA’, True, True, ‘/Game/MergedActors’)
merged_actor = unreal.EditorLevelLibrary.merge_static_mesh_actors(selected_actors, mergeOptions)

However this creates a new static mesh in the content Browser, and Places it in the Level. Also when selecting any of the original actors in viewport, only one gizmo is shown for the whole actor.

What I like about the “batch” method is that it does not create anything in the content browser, and it also allows you to select instances with a dedicated gizmo for each. After looking through the docs I haven’t found a set of options that allows you to select this or any other method. Hoping someone can point me in the right direction.