Preheat your air fryer to 375 degrees Fahrenheit and lightly grease the basket with one teaspoon of avocado oil.
Peel the sweet onion and cut it into thick rings, separating the layers carefully.
In a medium bowl, whisk together the whole wheat flour and light beer until a smooth batter forms.
Dip each onion ring into the batter to coat fully, then place in the air fryer basket in a single layer.
Cook the onion rings for 10 to 12 minutes, flipping halfway through, until they are golden and crispy.
Season the shrimp with half of the sea salt, black pepper, and garlic powder, then sear in a pan with the remaining avocado oil over medium-high heat for 2 minutes per side.
In a small bowl, combine the Greek yogurt, sriracha, and the remaining spices to create the zesty dipping sauce.
Serve the hot onion rings alongside the grilled shrimp with the chilled dip on the side.