In a bowl, add the mustard, maple syrup, oil, herbs, salt and black pepper and mix well.
Add the drumsticks and coat with the mixture generously.
Cover the bowl and refrigerate to marinate overnight.
Grease the Air Fryer Basket with cooking spray and then slide inside.
Adjust the temperature of Air Fryer to 320 °F to preheat for 5 minutes.
After preheating, arrange the chicken drumsticks into the greased Air Fryer Basket in a single layer.
Slide the basket into Air Fryer and set the time for 12 minutes.
After 12 minutes of cooking, flip the chicken drumsticks and adjust the temperature to 355 °F for 10 minutes.
After cooking time is finished, remove the chicken drumsticks from Air Fryer and serve.