Cut the chicken breast into 1-inch bite-sized cubes and place them in a small bowl.
Toss the chicken cubes with arrowroot powder, sea salt, and black pepper until every piece is evenly coated.
In a separate small jar or bowl, whisk together the pineapple juice, coconut aminos, apple cider vinegar, honey, grated fresh ginger, and minced garlic to create the stir-fry sauce.
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 per side until the edges are golden brown and crispy.
Add the sliced red bell peppers, snap peas, and pineapple chunks to the pan with the chicken, sautéing for an additional 2-3 minutes until the vegetables are tender-crisp.
Pour the prepared sauce over the chicken and vegetables, stirring constantly as the sauce bubbles and thickens into a glossy glaze.
Remove from heat once the sauce has fully coated the ingredients and serve immediately.