Cut the chicken breast into 1-inch cubes and season evenly with sea salt and black pepper.
In a small bowl, whisk together the coconut aminos, rice vinegar, honey, and arrowroot powder until the powder is fully dissolved.
Heat the avocado oil in a large skillet or wok over medium-high heat until it begins to shimmer.
Add the chicken cubes to the skillet and sear until golden brown on all sides and cooked through, approximately 5 to 7 minutes.
Remove the chicken from the skillet and set aside on a plate.
In the same skillet, add the sliced bell peppers, red onion, minced garlic, and grated ginger, sautéing for 3 to 4 minutes until the vegetables are crisp-tender.
Stir in the pineapple chunks and cook for 1 minute to warm them through.
Return the cooked chicken to the skillet and pour the prepared sauce over the mixture.
Toss everything together for 1 to 2 minutes until the sauce thickens into a glossy glaze that coats every ingredient.