Pat the fillets dry with paper towels Cut them lengthwise into 1- x 4-inch strips (I cut my cod fillets from Costco into 3 strips each to get 12 strips total). Season the fish with ½ teaspoon salt and a little pepper, to taste.
In a shallow dish (I use glass pie dishes), mix together the flour, remaining ½ teaspoon salt, and ½ teaspoon pepper. In a 2nd dish, beat the eggs. In a 3rd dish, combine the panko, Old Bay Seasoning, parsley, and garlic powder.
Preheat the air fryer to 400 degrees F for 5 minutes.
Coat each piece of fish with the seasoned flour, then coat it in the beaten eggs, and then coat it with the seasoned breadcrumbs. See the Notes section below for the dry hand-wet hand breading method.
Spritz the basket of the air fryer with propellant free nonstick spray. Coat the tops of the breaded fish with additional spray and place them in the preheated air fryer. Cook at 400 degrees for 8 minutes, flipping the fish halfway through the cooking time. The fish sticks should be crisped, golden brown and the internal temperature should be at least 145 degrees F when measured with an instant read thermometer. You can increase the cooking time, if needed.
To keep your first batch warm while cooking the rest, place them on a baking sheet and transfer them to a 200 degree F oven.
Serve with tartar sauce and lemon wedges on the side.