If the logic is in your Character BP, can’t you just call it through an interface function call from whichever checkpoint, such as an event when player enters, and when player leaves? For example, on begin overlap and on end overlap will have a pawn input on those events, then you can just call to that pawn (your character) and send in the checkpoint (actor) reference the character is interacting with. Then the character BP will now have access to this checkpoint reference from within its blueprint.
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