Spawned Actors do not appear in World Outliner

Spawning actors from a Blueprint via the SpawnActorFromClass function at runtime does not cause the World Outliner to update.

Tested in 4.21.2 (CL - 4753647), 4.22.1 (CL - 6063286), 4.23 (CL - 6420255)

1. Create a First Person Blueprint project
2. Create a Blueprint that spawns Actors on Tick (with a delay applied)
3. Simulate
4. Expand the World Outliner

Expected: The World Outliner's UI would reflect the spawned Actors in the scene

Result: Only the count for how many Actors there are within the level is updating