In a bowl, toss the chicken breast cubes with the low-fat Italian dressing, adobo seasoning, dried Italian herbs, kosher salt, and the optional taco seasoning. Let the chicken marinate for at least 15 minutes or up to 1 hour in the fridge.
Preheat your air fryer to 400°F. Lightly spray the air fryer basket with nonstick cooking spray.
Arrange the chicken bites in a single layer in the air fryer basket. You may need to work in batches, depending on the size of your air fryer.
Air fry the chicken bites until they are browned and cooked through, about 12 minutes, turning them at the halfway point.
Once cooked, remove the chicken bites from the air fryer and let them rest for a couple of minutes.
Serve while hot.