Microwave the rice according to package directions, or prepare your favorite rice. You'll need about 1 1/2 cups, cooked.
In a large bowl, mix together the cooked rice, black beans, corn, salsa, lime juice, and salt until well combined.
Fill each flour tortilla with a generous cup of the filling and top with about 1/4 cup of the shredded Mexican blend cheese.
Fold the burritos to seal in the filling tightly.
Line your air fryer basket with lightly oiled foil or parchment paper.
Place two burritos in the basket in a single layer. Top each one with a couple of tablespoons of taco sauce and 1/4 cup of shredded cheese.
Air fry the burritos at 350 degrees F for 8-10 minutes, until the cheese on top is completely melted and bubbly.
Repeat until all burritos are cooked. Serve immediately with diced tomato, avocado, and sour cream, if desired.