now if you are dead set on your current method then the below is a simple example of how it can be done. you create the score widget then save a refernce of it to a variable. then you have a overlap event either on the character or in the fruit bp and you get that widget reference. its simple here since its all in the same bp but if you were trying to do this from the fruit bp then you would first need to reference the player character and cast to the needed class before you could get the widget reference.
Ok Thank you so much for your help!