In a small bowl, whisk together the coconut aminos, rice vinegar, honey, minced ginger, and minced garlic to create the sauce.
Pat the chicken breast dry with a paper towel and cut into 1-inch cubes.
In a medium bowl, toss the chicken cubes with arrowroot powder, sea salt, and black pepper until evenly coated.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet in a single layer and sear for 3-4 minutes until golden and crispy on the outside.
Add the sliced red bell peppers, snap peas, and pineapple chunks to the skillet with the chicken.
Stir-fry for 2-3 minutes until the vegetables are tender-crisp and the pineapple is slightly caramelized.
Pour the prepared sauce over the mixture and stir constantly for 1 minute until the glaze thickens and coats everything beautifully.
Serve the stir-fry immediately over the warm cooked brown rice.