In a small bowl, whisk together the coconut aminos, apple cider vinegar, honey, sesame oil, arrowroot powder, minced ginger, and minced garlic.
Season the cubed chicken breast evenly with the sea salt and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat until the oil is shimmering.
Add the chicken to the skillet and cook for 5-6 minutes, stirring occasionally, until golden brown and cooked through.
Remove the chicken from the pan and set aside on a plate.
In the same skillet, add the sliced red bell pepper, green bell pepper, and red onion, sautéing for 3-4 minutes until they are tender-crisp.
Add the fresh pineapple chunks and the cooked chicken back into the skillet.
Pour the prepared sauce over the mixture and toss constantly for 1-2 minutes until the sauce thickens into a glossy glaze that coats every piece.