Prepare the Chicken: Pat chicken breasts dry, pound to an even thickness, and season with salt, pepper, and garlic powder.
Make the Maple Glaze: In a saucepan, combine maple syrup, soy sauce, and Dijon mustard over medium-low heat. Simmer for 5-7 minutes until thickened.
Air Fry Chicken: Preheat air fryer to 375°F (190°C). Cook seasoned chicken for about 8-10 minutes per side until the internal temperature reaches 165°F (74°C).
Apply Glaze: Brush warm glaze over chicken and return to air fryer for an additional 2-3 minutes until caramelized.
Serve: Let rest briefly before serving with your choice of sides.