Combine all the ingredients (except for the barbecue sauce) in a large bowl and mix until everything is combined well.
With wet hands, form the mixture into 6-8 burger patties just slightly larger than the burger buns you're planning on serving. The patties will shrink slightly while cooking.
Preheat the air fryer to 400°F/205°C.
Add the burgers to the air fryer basket and spray with oil.
Air fry for 5 minutes, flip over then brush with barbecue sauce and air fry for another 5 minutes or until the patties are done to your preference.
Serve the burgers with all your favorite toppings on toasted buns.