Yes, I realize these actions can by driven by the tablets for the Menehune Adventure Trail. I'm saying you can trigger it both ways. Via tablet (for the Menehune Adventure Trail) or MB. Or at least you can for the turtle. Can't speak for the other things on the trail as we never tried it. It worked for us when we were there back in Dec 2023...
My MB and my wife's MB would light up and give us haptic feedback whenever we walked by the turtle. Not even realizing what was happening the first few days of our trip. We just figured our MBs were triggered by walking outside into the pool area as it was very close to the exit from the elevators, and it continued to happen in the same spot. Until we coincidently saw a young girl walk up to the rock face when we were walking by as well, and she waved her MB and the turtle lit up. (Just like how similar interactive experiences at DL and DCA are triggered). So the next time we walked by, our MB lit up and vibrated just like they had been doing our entire trip, and then my wife waved her MB near the rock face and sure enough the turtle lit up.