Cut chicken breast into 1-inch cubes and season with sea salt, black pepper, garlic powder, and ginger powder.
In a small bowl, whisk together coconut aminos, rice vinegar, pineapple juice, and arrowroot powder to create the sauce.
Heat avocado oil in a large skillet or wok over medium-high heat.
Add chicken to the skillet and sear until golden brown and cooked through, about 5-7 minutes.
Remove chicken from the pan and add the diced bell peppers and red onion, sautéing until tender-crisp.
Stir in the pineapple chunks and return the chicken to the skillet.
Pour the sauce over the mixture and stir constantly until the glaze thickens and coats everything evenly.
Serve immediately while hot and glossy.