Prep the air fryer: Preheat to 400°F (200°C) for 3–5 minutes. A hot basket helps the coating crisp right away.
Set up dredging station: In one shallow bowl, add flour. In a second bowl, whisk eggs with milk.
In a third bowl, mix panko, plain breadcrumbs, ranch seasoning, garlic powder, paprika, pepper, salt, and Parmesan (if using).
Pat chicken dry: Blot tenders with paper towels. Dry chicken grips the coating better and gets crisper.
Coat the tenders: Dredge each piece in flour (shake off excess), dip in egg, then press into the breadcrumb mixture until fully coated.
Lightly oil: Spray both sides of the breaded tenders with oil. Don’t drench them, just a light, even mist to help browning.
Air fry the first batch: Arrange tenders in a single layer in the preheated basket. No overlapping. Cook at 400°F (200°C) for 5–6 minutes.
Flip and finish: Flip tenders, spray lightly again, and cook another 5–6 minutes, or until the coating is golden and the internal temperature reaches 165°F (74°C).
Rest briefly: Transfer to a plate and let rest 2–3 minutes to lock in juices.
Repeat: Cook remaining tenders in batches. Keep cooked ones warm in a 200°F oven if needed.
Serve: Squeeze with lemon and serve with ranch, honey mustard, buffalo sauce, or BBQ.