Preheat your air fryer to 375°F (190°C).
Slice the chicken breast into thin strips and season with half of the sea salt, black pepper, and garlic powder.
Grill the chicken strips in a non-stick pan over medium-high heat until golden brown and cooked through, about 4-5 minutes per side.
Peel the sweet onion and cut into 1/2-inch thick rings, separating the layers.
In a medium bowl, whisk together the chickpea flour, cold light beer, egg white, smoked paprika, and the remaining garlic powder, salt, and pepper until a smooth batter forms.
Dip each onion ring into the batter, allowing the excess to drip off, then place them in a single layer in the air fryer basket.
Lightly mist the onion rings with avocado oil and air fry for 10-12 minutes, flipping halfway through, until they are golden and crunchy.
In a small ramekin, stir together the Greek yogurt and sriracha to create the zesty dipping sauce.
Serve the hot onion rings immediately alongside the grilled chicken strips and the dipping sauce.