Preheat your air fryer to 375°F.
Pound the chicken breast to ensure even thickness. Pat dry with a paper towel.
In a shallow bowl, lightly beat the egg. In another plate, spread out the panko breadcrumbs.
Dip the chicken breast first into the egg, then coat thoroughly with panko breadcrumbs, pressing gently to adhere.
Lightly spray the coated chicken with cooking oil spray to help crisp the exterior.
Place the chicken in the air fryer basket and cook for about 12-15 minutes, flipping halfway through, until the chicken is cooked through and the coating is golden and crispy.
While the chicken cooks, prepare the orange sauce. In a small saucepan over medium heat, combine the orange juice, orange zest, minced garlic, and grated ginger. Bring the mixture to a simmer and allow it to reduce slightly, about 3-4 minutes.
Once the chicken is done, remove it from the air fryer and drizzle with the warm orange sauce, or serve the sauce on the side for dipping.
Garnish with extra orange zest if desired and serve immediately.