Slice the sweet onion into thick rings and pat them dry with a paper towel.
Season the chicken breast with 1 teaspoon of olive oil, garlic powder, and half of the salt and pepper.
Grill or pan-sear the chicken until it reaches an internal temperature of 165°F, then slice into strips.
In a medium bowl, whisk together the chickpea flour, smoked paprika, and the remaining salt and pepper.
Stir in the light beer and egg white until a smooth, thick batter forms.
Dip each onion ring into the batter, ensuring it is fully coated, and place in a single layer in an air fryer basket.
Lightly brush or spray the rings with the remaining teaspoon of olive oil.
Air fry at 375°F for 10-12 minutes, flipping halfway through, until the coating is golden and shatteringly crisp.
Serve the hot onion rings immediately with the sliced grilled chicken.