Preheat your air fryer to 400°F, while you mix up the rub and prepare the pork. This should only take about 5 minutes.
Add the cajun seasoning and brown sweetener to a bowl and whisk together.
Remove any excess fat and silver skin from your pork tenderloin, then pat dry with paper towels.
Brush the olive oil all over the pork. Sprinkle the dry rub mix over the pork and rub on all sides with your hands.
400°F for 20 minutes or until it reaches an internal temperature of at least 145°F on a meat thermometer. Flip half way through cooking, if you’re not using an air fryer oven like this one.
Allow to rest for 10 minute before slicing. This allows the juices to redistribute into the pork.
Notes
If you already have a store bought cajun seasoning that you like, you can certainly use that instead of making your own.