In a medium bowl, combine the ground chicken, red onion, garlic, lemon zest, dill, oregano, salt, and pepper. Stir well to combine.
Divide the mixture into 16 equal portions. Roll each portion into a ball with damp hands. Cook using your preferred method.
Preheat the air fryer to 400°F. Place meatballs in the basket, spacing them out. Air fry for 7-8 minutes, turning halfway, until 165°F.
Alternatively, heat 2 teaspoons of oil in a large skillet over medium heat. Cook meatballs for 5-7 minutes per side until 165°F.