I just tried it. You have to toggle Jingle Outside on first, then turn on the Jingle All The Way toggle. Not very intuitive, but it works on my car. I'm guessing zero resources at Tesla will be dedicated to make Jingle Outside more intuitive, so it'll be the way it is.
It's cool that it works while the car is driving, so I'll be using it a few times this month for sure. LOL! Too bad it only plays for about 15 seconds.