Brush the olive oil over the chicken, and then season the chicken with salt, black pepper, garlic powder, onion powder, and chili powder.
Preheat the air fryer to 380 degrees F, air fryer setting, and then place your chicken into the basket, set the timer to 5 minutes, flip your chicken, and air fry for another 5 to 8 minutes, or until the internal temperature of the chicken reaches 165 degrees F.
Remove the chicken from the air fryer basket, and let cool slightly, before slicing.
In a large bowl, combine lettuce with the avocado, tomatoes, parmesan cheese, and dressing, then toss to coat. Top with the chicken.
Pour over the additional dressing, then top with the croutons and more cheese, if desired.