Preheat your air fryer to 375°F (190°C).
In a small bowl, whisk together the Greek yogurt, minced chipotle peppers, and a pinch of sea salt to create the aioli. Set aside in the refrigerator.
Slice the sweet onion into 1/2-inch thick rings and slice the chicken breast into thin strips.
In a shallow bowl, whisk the egg white and light beer until frothy. In another bowl, combine the flour, garlic powder, smoked paprika, sea salt, and black pepper.
Dip each onion ring and chicken strip into the beer mixture, then dredge through the seasoned flour until evenly coated.
Lightly grease the air fryer basket with avocado oil. Place the onion rings and chicken in a single layer, ensuring they do not overlap.
Air fry for 10-12 minutes, flipping halfway through, until the coating is golden brown and the chicken is cooked through.
Serve the hot onion rings and chicken immediately with the chilled chipotle aioli for dipping.