Referencing all triggers?

You mean Trigger Volumes?
Yes there is node “get all actors of class” it makes an array

But if i guessed correctly what you want to do, there is better way:

  • create an actor, add collision box to it as component.
  • create event dispatcher in one of those bps: gameMode gameState or playerPawn (or character). Best for testing is in player character, all code in one place.
  • from actor that you created assign event to dispatcher in player character (or other bp i mentioned)
    Then call that event dispatcher in player character, all actors will be notified, then they can move their trigger box to same level.