How to get the child actors attached in World Outliner?

But like… Why does it return nothing when an actor queries its own child? Seems like a legitimate request to me.
Using another actor for that really breaks encapsulation.
Using the level sounds like more logical, but I wish there was a way like “getLevel->QueryActorAttachedChildren” to call from within the actor. I don’t want to write bespoke code in my level blueprint either.

Is there any well encapsulated way to request the ouliner children?