Preheat the air fryer: Set to 380°F (193°C) for 3–5 minutes. A hot basket helps the meatballs brown well.
Mix the panade: In a bowl, stir together the breadcrumbs, milk, and egg. Let it sit 2 minutes to hydrate.
Add flavor: Mix in Parmesan, garlic, onion, parsley, Italian seasoning, salt, and pepper until combined.
Add the turkey: Gently fold the ground turkey into the mixture with a fork or your hands. Do not overwork—stop once evenly combined.
Shape the meatballs: Lightly oil your hands and roll into 16–18 balls (about 1 to 1.25 inches). Aim for even size so they cook uniformly.
Prep the basket: Spray the air fryer basket lightly with olive oil to prevent sticking.
Air fry: Arrange meatballs in a single layer with a little space between each. Cook at 380°F (193°C) for 10–12 minutes, shaking or turning halfway.
Check doneness: Use an instant-read thermometer. Internal temp should be 165°F (74°C). If needed, cook 1–2 minutes more.
Rest briefly: Let meatballs sit for 3 minutes so juices redistribute. Serve as desired.