Pat the chicken breast dry with a paper towel and cut it into small, popcorn-sized half-inch cubes.
In a medium mixing bowl, toss the chicken cubes with half of the avocado oil, garlic powder, sea salt, and black pepper until every piece is evenly coated.
Place the seasoned chicken in the air fryer basket in a single layer, ensuring they are not crowded.
Air fry at 400°F for 8 to 10 minutes, shaking the basket halfway through, until the chicken is golden brown and cooked through.
While the chicken is cooking, place the pre-popped popcorn into a large, clean mixing bowl.
Drizzle the remaining avocado oil over the popcorn and toss well to ensure the oil is lightly distributed.
Add the hot air-fried chicken bites directly into the bowl with the popcorn.
Sprinkle the grated parmesan cheese and dried parsley over the mixture, tossing vigorously so the cheese melts slightly onto the warm chicken and adheres to the popcorn.
Transfer the mixture to a serving bowl and enjoy immediately while the chicken is hot and the popcorn is crisp.