I beleive this is a misspelling on epics part. I think this is suppose to say “owner” not outer. So you would access this variable by the function “get owner” inside the constructed object.
I would think the choice of words are intentional not to clash with the owner property of the AActor class. Remember, OP is talking about UObject not AActor. And as per the documentation the UObject class has neither a GetOwner nor a GetOuter function.
Ahh yes, you are right… I was confused because the description of the pin reads “the owner of the constructed object”. I cannot seem to find a way to access this variable either.
UObjects do not have a GetOwner() method, only a GetOuter() method
The GetOuter() method, as mentioned by OP, is not callable from Blueprints.
This question should really be marked as unanswered because it’s kind of a pain in the ■■■ to have to make a code change just to expose this function to Blueprints.