Preheat the air fryer to 400°F (200°C).
In a bowl, combine shrimp with olive oil, garlic powder, salt, and pepper.
Sauté the seasoned shrimp in the air fryer for 5-6 minutes.
Spread marinara sauce evenly over the pizza crust.
Sprinkle shredded mozzarella cheese over the sauce.
Distribute sautéed shrimp, bell peppers, and red onions on top of the cheese.
Place the assembled pizza into the air fryer.
Air fry for 8-10 minutes, or until the crust is golden brown.
Remove from the air fryer and let cool for a few minutes before slicing.
Slice, serve, and enjoy your air fryer shrimp pizza.