Please re-read the food descriptions that mention boba balls. None of them say anything is going inside the boba. It lists boba balls as one of the toppings along with vegetable slaw.
For example:
Chopped Wood-Grilled Chicken Bowl
Wood-Grilled Chicken Thighs marinated with Garlic and Olive Oil topped with Crunchy Vegetable Slaw and Boba Balls served with your choice of Base and Sauce
$11.49
If you look at the photos, note the boba balls on top of the slaw. They really should have added a comma after balls to make it clearer what they meant.