Preheat Your Air Fryer: Start by preheating your air fryer to a hot 400°F (204°C).
Prep the Pork: Carefully trim any excess fat or silver skin from your pork tenderloins. Gently pat them completely dry with paper towels; this helps the flavors really stick!
Whip Up the Glaze: In a small bowl, whisk together the olive oil, melted butter, maple syrup, apple cider vinegar, Dijon mustard, and garlic powder until you have a smooth, delicious glaze.
Coat and Season: Brush this flavorful glaze generously all over the pork tenderloins, making sure every side is covered. Then, season all over with sea salt and black pepper.
Air Fry to Perfection: Place the prepared pork tenderloins in your air fryer basket. Cook for about 15-20 minutes, flipping them halfway through to ensure a beautiful, even golden crust. Your pork is perfectly cooked when an instant-read thermometer inserted into the thickest part reads 140°F (60°C).
Rest for Juiciness: Once cooked, remove the pork from the air fryer and loosely tent it with foil. Let it rest for 5-10 minutes. This crucial step locks in all the wonderful juices, and the internal temperature will gently rise to 145°F (63°C).
Slice and Enjoy: Slice your tender, juicy air fryer pork tenderloin against the grain and serve immediately for a wholesome and incredibly easy meal!