Preheat the oven to 400°F and the air fryer to 375°F.
Add the green beans to a lined sheet pan. Drizzle with avocado oil and season with garlic & herb seasoning, salt, and pepper.
Par-roast the green beans in the 400°F oven for 15 minutes.
Place the 40 meatballs in the air fryer and air fry at 375°F for about 4 minutes to develop flavor.
While the green beans and meatballs cook, add the chicken broth, cottage cheese, sour cream, Dijon mustard, Worcestershire sauce, soy sauce, cornstarch, onion powder, garlic powder, and black pepper to a blender. Blend until smooth.
Divide the green beans and meatballs evenly among 5 oven-safe meal prep containers.
Spoon the Swedish gravy evenly over the meatballs, about ½ cup per serving.
Return the uncovered containers to the 400°F oven and bake for 15–20 minutes.
Let the containers cool completely before adding the lids. Refrigerate and reheat as needed.