Place dried hominy in a large bowl. Cover with 4+ cups of cold water and soak for 8–12 hours or overnight. Drain and rinse.
Spread soaked hominy on a clean kitchen towel. Pat dry and let air-dry for 45–60 minutes until completely dry on the surface.
Transfer to a large bowl. Drizzle with olive oil and toss to coat every kernel. Add salt, garlic powder, smoked paprika, and onion powder. Toss until evenly seasoned.
Preheat air fryer to 400°F for 3–5 minutes.
Spread hominy in a single flat layer in the basket — do not stack or overcrowd. Work in batches if needed.
Air fry at 400°F for 20–22 minutes, shaking the basket every 5 minutes for even crisping.
At the 20-minute mark, remove one corn nut, let cool 2 minutes, and bite in. If still chewy in center, continue cooking in 3–5 minute increments.
When done, transfer to a paper-towel-lined plate. Season with additional salt while still warm. Cool 5 minutes before eating — they harden as they cool.