In a bowl, combine the shrimp with buttermilk, making sure all the shrimp are coated. Let them marinate for about 15 minutes to tenderize.
In another bowl, mix the flour, cornstarch, garlic powder, paprika, salt, and pepper.
Drain the marinated shrimp and pat them dry with paper towels.
Dip each shrimp into the flour mixture, coating them thoroughly and shaking off any excess.
Preheat your air fryer to 400°F (200°C) for a few minutes.
Arrange the coated shrimp in a single layer in the air fryer basket, making sure they don't overlap.
Air fry the shrimp in batches for 6-8 minutes, flipping them halfway through the cooking time for even browning. The shrimp should be crispy and golden brown.
While the shrimp are cooking, prepare the Bang Bang Sauce. In a small bowl, whisk together mayonnaise, sweet chili sauce, sriracha sauce, honey, rice vinegar, garlic powder, and salt until well combined.
Once the shrimp are done, transfer them to a large mixing bowl. Add the Bang Bang Sauce and toss the shrimp until they are evenly coated.
Garnish with chopped green onions and sesame seeds (if using).
Serve the Air Fryer Copycat Bonefish Grill Bang Bang Shrimp immediately while they are hot and crispy.