In a bowl, add your boneless skin on chicken thighs, minced garlic, minced shallot, minced lemongrass, Red Boat Fish Sauce, soy sauce, brown sugar, and black pepper. Mix thoroughly and allow to marinate for 30 minutes. Preheat your air fryer to 375F. Add your chicken thighs, skin side down, and air fry for 7-9 minutes .