is it possible to Trigger a custom event from Behavior tree Task or Service?

I am trying to avoid event tick, so I am trying to have a BT Service or task show / hide a Widget in the actor components.

I can get it to work with event tick easily in the parent of the NPC’s using distance to with event tick.

My question is how do I get an event in the individual NPC to trigger from the bevior tree without triggering ALL the NPC’s of the same class?