Can you just spawn a box collision without a blueprint?

And then a way of knowing WHO spawned it?

no

what are you trying to do? To know who spawned it you can at least probably just use tags.

I’m not sure about spawning the boxes themselves… But I don’t see why not, not in the engine so I can’t exactly check. But a collision box without a blueprint actor parent sounds kinda pointless no?

You can add component by class:

Target becomes the owner the component can query.

Components “Spawned” must be tied to an Actor class.

If you drag in a trigger box or any other component to the level the editor creates an actor class for it.