It’s more a dishwasher level of automation than 3CPO- when you order they enter your table number and the kitchen staff puts the prepared dishes in the shelves in the robot, which the drives to your table. Once it gets there you take the dishes from the robot.
Tech-wise this could have existed 30 years ago (maybe going around the restaurant would have been more challenging than today but it’s a fixed path and the robots don’t leave the restaurant).