Preheat the Air Fryer: Preheat your air fryer to 400°F (200°C) for a few minutes.
Season the Snapper: Place the frozen snapper fillets on a plate or tray. Drizzle them with olive oil and lemon juice, ensuring both sides are lightly coated. Sprinkle garlic powder, paprika, dried thyme, salt, and black pepper over the fillets, evenly seasoning both sides.
Arrange in the Air Fryer Basket: Lightly grease the air fryer basket to prevent sticking. Place the seasoned frozen snapper fillets in a single layer in the basket, leaving space between each fillet for even cooking.
Cook in the Air Fryer: Place the air fryer basket with the snapper fillets inside the preheated air fryer. Cook the frozen snapper at 400°F (200°C) for 10-12 minutes. Flip the fillets halfway through cooking to ensure both sides are evenly crispy.
Check for Doneness: To ensure the snapper is fully cooked, use a food thermometer to check the internal temperature. The snapper should reach an internal temperature of 145°F (63°C) for safe consumption.
Garnish and Serve: Once the snapper is cooked and beautifully crispy, remove it from the air fryer basket. Garnish with fresh parsley if desired, and serve hot.