Peel and thinly slice the onions. Try to keep the rings mostly intact.
Soak the onion slices in buttermilk for at least 30 minutes. Let them get comfy.
Mix the breadcrumbs, garlic powder, paprika, salt, and pepper in a shallow bowl.
Remove onions from buttermilk, shake off the excess, and toss them in the breadcrumb mix until coated.
Preheat your Instant Pot Air Fryer to 375°F (190°C).
Place the coated onion rings in the air fryer basket in a single layer. Don't overcrowd.
Spray lightly with olive oil. This is what makes them golden and crisp.
Air fry for 10–12 minutes, flipping halfway through, until they’re deeply golden and crispy.
Repeat in batches if needed. Serve warm, snack shamelessly.