Prep the wings: Pat wings very dry with paper towels.
Dry wings crisp better. Toss with 1 teaspoon salt, 1/2 teaspoon black pepper, and 2 tablespoons cornstarch until evenly coated.
Preheat the air fryer: Set to 390°F (200°C) for 5 minutes. Lightly oil the basket and the wings or use a light oil spray.
Air-fry the first side: Arrange wings in a single layer, leaving space between pieces.
Cook at 390°F for 10 minutes.
Flip and finish: Flip wings and cook another 8–12 minutes, until golden, crisp, and the internal temperature hits 165°F. Thicker wings may need a couple more minutes.
Make the sauce: While wings cook, combine pineapple juice, soy sauce, brown sugar, honey, rice vinegar, garlic, ginger, sesame oil, and optional sriracha in a small saucepan. Bring to a simmer over medium heat for 3–4 minutes.
Thicken the glaze: Stir in the cornstarch slurry and simmer 1–2 minutes until glossy and slightly thick.
It should coat the back of a spoon. If too thick, add a splash of pineapple juice; if too thin, simmer a bit longer.
Toss to coat: Transfer hot wings to a large bowl. Pour over enough glaze to coat (you may not need all of it).
Toss quickly so the sauce clings without softening the skin.
Garnish and serve: Top with sesame seeds, green onions, and a sprinkle of fresh pineapple. Serve immediately with extra glaze on the side for dipping.