The world has moved on since COVID, and many businesses, such as this one, are running 2 restaurants out of 1 storefront, one that is online and one in person. You might consider setting up a separate station to process online orders. Another option is to train your employees to, when pausing lunch service to make a bunch of online orders, look up at the person they are making wait. Perhaps they could even greet the person, smile, or apologize for the delay. The current system of completely ignoring the person who has been waiting while the employee makes 12+ sandwiches, doesn't work.