Pat the chicken breasts dry with paper towels. If uneven, pound to about ¾-inch thickness for even cooking.
In a small bowl, combine the lemon zest, lemon pepper seasoning, black pepper, garlic powder, onion powder, paprika, and salt.
Drizzle the chicken with olive oil and lemon juice, then rub the seasoning blend over both sides until evenly coated. For deeper flavor, rest 15–30 minutes (optional).
Preheat the air fryer to 380°F (193°C) for 3–5 minutes. Lightly spray the basket.
Place the chicken in a single layer without crowding. Cook at 380°F for 18–22 minutes, flipping halfway, until golden and the internal temperature reaches 165°F (74°C).
Rest 5 minutes, then garnish with parsley and lemon slices and serve.