Coat the air fryer basket with nonstick spray and preheat according to your model if required.
If needed, split the wings: remove and discard the wing tips, then separate each wing into a drumette and a flat at the joint.
Pat wings dry with paper towels and season all over with 1 teaspoon kosher salt.
Arrange wings in a single layer in the air fryer basket without touching; stand drumettes upright along the sides if necessary.
Set the air fryer to 360°F and cook the wings for 12 minutes; remove the basket and flip the wings with tongs, then return and cook another 12 minutes at 360°F.
Slide the basket out again, flip the wings, increase the temperature to 390°F, and cook for 6 minutes more, flipping once halfway; cook a few extra minutes if wings are large, until skin is crisp.
While the wings cook, combine 2 tbsp soy sauce, 2 tbsp maple syrup, 1 tbsp rice vinegar, 1 tbsp minced garlic, 2 tsp minced ginger, and 1/2 tbsp gochujang in a medium saucepan; bring to a simmer over medium-high and cook, whisking, until slightly reduced about 1 minute, then stir in 2 tsp sesame oil and transfer to a large bowl.
When wings are done, transfer them to the bowl with the sauce and toss to coat evenly.
Transfer wings to a serving platter and sprinkle with chopped green onions and sesame seeds; serve hot.