In a small bowl, whisk together the pineapple juice, coconut aminos, rice vinegar, honey, and arrowroot powder until smooth to create the sauce.
Cut the chicken breast into bite-sized pieces and season evenly with sea salt and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and sauté until golden brown 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 diced bell peppers, red onion, and pineapple chunks, stir-frying for 3 to 4 minutes until the vegetables are crisp-tender.
Stir in the minced garlic and grated ginger, cooking for 30 seconds until fragrant.
Return the cooked chicken to the skillet and pour the prepared sauce over the mixture.
Toss everything together and simmer for 1 to 2 minutes until the sauce thickens into a glossy glaze that coats the ingredients.
Serve the sweet and sour stir-fry immediately over the warm cooked rice.