Preheat your air fryer to 375°F and lightly coat the basket with avocado oil.
Slice the sweet onion into half-inch thick rings and cut the chicken breast into thin, even strips.
In a medium bowl, whisk together the chickpea flour, garlic powder, smoked paprika, sea salt, and black pepper.
Gradually whisk in the light beer and the egg white until the batter is smooth and slightly thick.
Dredge each onion ring and chicken strip into the batter, ensuring they are fully coated.
Place the coated pieces in the air fryer basket in a single layer, working in batches if necessary to avoid overcrowding.
Air fry for 12 to 15 minutes, flipping halfway through, until the coating is golden and has a satisfying crunch.