Non-exposed reference between Character_BP and DinoCharacterStatusComponent_BP

The issue you are experiencing is due to limitations when creating a child of a blueprint. Components of a child blueprint (in the components tab) still depend on the parent so the reference is there, but it is made through the parent (or your blueprint actually does not have a statuscomponent in the components tab). To work around the child problem, you can instead make a duplicate of the blueprint rex such that its components are unique. If it is the latter mentioned problem, you simply need to add the statuscomponent to the components.