01 - Set the air fryer to 400°F and allow it to reach temperature.
02 - Separate onion slices into individual rings, reserving small inner pieces for another use.
03 - Place flour combined with salt and black pepper in the first bowl; whisk eggs and buttermilk in the second; mix panko breadcrumbs with smoked paprika in the third.
04 - Dredge each onion ring in the seasoned flour, tapping off excess.
05 - Dip floured rings into the egg and buttermilk mixture, ensuring complete coverage.
06 - Press the egg-coated rings into the panko mixture until evenly coated.
07 - Place breaded rings in a single layer inside the air fryer basket and lightly spray with olive oil.
08 - Cook the onion rings for 10 to 12 minutes, turning halfway through and reapplying olive oil spray, until golden brown and crispy.
09 - While cooking, blend mayonnaise, ketchup, mustard, chopped pickles, pickle juice, garlic powder, smoked paprika, and season with salt and pepper to taste.
10 - Serve the hot onion rings accompanied by the prepared burger sauce.