Is not turning a deaf ear not working out? Like getting distracted by the phone and not paying attention? If it’s repeated over and over again, that shows their anxiety. It’s annoying to hear but know that whatever you are doing is causing the reaction, so it’s probably working. Responding to it is the best way to make them feel important, try to move away, go to the loo, look at the phone, put on headphones and “study” etc.