In a small saucepan, combine the first 8 ingredients. Bring to a boil; reduce heat. Simmer, uncovered, until thickened, 6-8 minutes, stirring occasionally., Preheat air fryer to 350°. Sprinkle pork with salt and pepper. Place pork on greased tray in air-fryer basket; spritz with cooking spray. Cook until pork begins to brown around edges, 7-8 minutes. Turn; pour 2 tablespoons sauce over pork. Cook until a thermometer inserted into pork reads at least 145°, 10-12 minutes longer. Let pork stand 5 minutes before slicing. Serve with remaining sauce. If desired, top with sliced green onions.