If your burger patties are not frozen, you can reduce the cooking time to 8-12 minutes. If using turkey burgers, make sure the center is cooked fully to avoid unwanted bacteria.
For veggie burgers check with the cooking directions on the package. If there are no specific air fryer instructions, you can use the baking directions by lowering the temperature by 20 °C (36° F) and by reducing the cooking time by about half.