[UE5] why hlod outliner is greyed out?

[thro (Þröstur)]

It seems that it is not yet supported with World Partition.

bool SLevelEditor::CanSpawnLevelEditorTab(const FSpawnTabArgs& Args, FName TabIdentifier)
{
	// HLOD Outliner not yet supported with World Partition
	if (TabIdentifier == LevelEditorTabIds::LevelEditorHierarchicalLODOutliner && ensure(World) && World->IsPartitionedWorld())
	{
		return false;
	}

	return true;
}