Place all dressing ingredients in a food processor or blender and blend until completely smooth, scraping down the sides as needed.
Preheat the air fryer to 400°F (200°C).
In a bowl, mix taco seasoning, brown sugar, and cornstarch together.
Add olive oil to the spices and stir into a thick paste.
Coat the chicken chunks thoroughly with the seasoned oil mixture.
Lay the chicken pieces in a single layer in the air fryer basket, spaced apart for airflow.
Cook the chicken in the air fryer for 9 to 12 minutes, until the internal temperature reads 165°F.
Prepare the brown rice according to instructions and transfer to a bowl while still warm.
Stir cilantro, lime juice, and salt into the warm rice until evenly mixed.
Distribute the chopped romaine, corn, black beans, rice, chicken, and cherry tomatoes evenly into four bowls.
Drizzle each bowl generously with the cilantro-lime dressing before serving.