Pass ref to new actor created in blueprint

I have two blueprints… in blueprint A I create a new actor component. I need to send a reference of this object to blueprint b.

I can make a new var in blueprint b that is of the object type, but I can’t set the default value of it (the only option is none), since it isn’t created until the blueprint is run I’m assuming.

How can I assign a reference to it?

You said it yourself: Just assign the reference once the actor or component it needs to reference gets spawned, and make sure to put IsValid checks before any other references to it in your blueprints, so it doesn’t cause errors or warnings due to trying to access it when it’s not there yet.