Hello there! I would be happy to help you get your leftover supermarket pizza nice and warm without losing its moisture or making the crust too hard.
To achieve the best results, preheat your air fryer to 350°F (about 175°C). Place the slices inside in a single layer, and heat them for about 3 to 4 minutes. If your pizza crust is particularly thick or dry from the fridge, you can sprinkle a tiny bit of water on the crust edge before heating to keep it soft.
Enjoy your quick and easy dinner after your long workday!