Cook the frozen meatballs for 9-11 minutes shaking halfway through until the internal temperature reaches 160 degrees.
Remove the meatballs from the air fryer and toss in the marinara sauce and oregano.
Add meatballs to sub rolls and spoon on 2 tablespoons of marinara sauce on top remaining from the bowl.
Top sub sandwich with freshly grated Parmesan cheese.
Turn air fryer to 350 degrees, slowly place meatball parm subs inside the air fryer, and cook for 2 minutes until the cheese is melted and sauce is warmed.
Carefully remove subs from the air fryer, top with more Parmesan cheese if desired and enjoy!
This nutrition information is based on the exact products I used in this recipe. Brands and sizes of products could alter exact nutrition and should always be calculated independently.