Cut chicken into bite-sized pieces and toss in a bowl with arrowroot powder, sea salt, and black pepper until evenly coated.
In a small jar or bowl, whisk together the coconut aminos, rice vinegar, honey, sesame oil, and grated fresh ginger 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 cook for 5-6 minutes, turning occasionally, until golden brown and crispy.
Toss in the sliced red bell pepper, snap peas, and pineapple chunks, sautéing for an additional 3 minutes until the vegetables are tender-crisp.
Stir in the cauliflower rice and pour the prepared sauce over the mixture, tossing constantly for 2 minutes until the sauce thickens and coats everything beautifully.