Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
Dice chicken and vegetables into 1-inch cubes. Add to a large mixing bowl.
In a measuring cup, whisk together soy sauce, ketchup, honey, pineapple juice, rice vinegar, garlic, ginger, and red pepper flakes. Whisk in arrowroot powder until smooth.
Pour sauce over chicken and vegetables. Toss until fully coated.
Spread mixture evenly on prepared baking sheet.
Bake for 10 minutes. Remove from oven and add pineapple chunks, tossing gently to coat.
Bake for another 15 minutes, until chicken is cooked through.
Broil for 3–4 minutes for caramelized edges.
Serve your Sheet Pan Hawaiian Chicken over rice and spoon extra sauce on top to keep everything juicy and flavorful.