Place the swordfish, pineapple chunks, red onion, and red bell pepper in a large mixing bowl. Add the olive oil, lime zest, fresh cilantro, and garlic powder, and season with salt and black pepper, to taste. Gently toss to combine. Set aside to marinate for 15-20 minutes, stirring once or twice during that time.
Drain the marinade, and then place the swordfish, pineapple, onions, and bell peppers in the air fryer basket. Spread the ingredients out so they are in a single layer. Set the temperature to 350 degrees F, and set the cooking time for 10-12 minutes. Brush the top of each steak with lime juice or olive oil.
Continue to cook fish until the internal temperature reaches 145 degrees F, with a meat thermometer.
Serve with fresh lime wedges.