Pat zucchini completely dry with paper towels to remove all excess moisture.
Set out three shallow bowls: flour; eggs; panko mixed with Parmesan, garlic powder, Italian seasoning, salt, and pepper.
Dredge zucchini in flour, dip in egg, then coat thoroughly in crumbs, pressing gently to adhere.
Spray air fryer basket with cooking spray; arrange zucchini in single layer without touching.
Lightly spray tops; air fry at 400°F for 10-12 minutes until golden brown and crispy, flipping halfway.
Serve immediately with marinara or ranch for dipping.