Season the chicken with garlic powder, onion powder, paprika, salt, and pepper.
Dredge each piece in flour, then egg, then the panko mixed with Parmesan.
Spray lightly with cooking spray and air fry at 400°F for 8–10 minutes, flipping halfway through, until golden brown and cooked through.
Meanwhile, whisk together all of the Caesar dressing ingredients until smooth.
Mix together the melted butter, garlic, parsley, and Parmesan. Brush the cut sides of the rolls and toast until golden.
Lightly toss the chopped romaine with a few spoonfuls of the Caesar dressing.
Spread additional dressing on the toasted rolls, add the crispy chicken, top with the Caesar salad and fresh Parmesan, then finish with the top half of the garlic bread.
Serve immediately while everything is warm and crispy.