How get already overlapped objects ?(not overlapping)

How can I get objects are already in the collision area?

for example in starting the game objects are already placed in collision area then no overlapping happened to walls of the collision, My question is how I can get objects are already placed in the collision area?

Thanks.

TArray overlappingComponents;
CollisionArea->GetOverlappingComponents(overlappingComponents);

You can get a list of currently overlapping components with this function.

Thanks for replay.
from your replay, I used GetOverlappingActors().