Season the chicken pieces with garlic powder, paprika, salt, and pepper in a medium bowl, ensuring each piece is evenly coated.
Heat olive oil in a large skillet over medium-high heat until shimmering but not smoking.
Add the chicken in a single layer, giving each piece enough space to properly brown. Cook for 4-5 minutes, turning occasionally, until the chicken reaches an internal temperature of 165°F (74°C) and has a golden-brown exterior.
In a small bowl, whisk together the Greek yogurt, sweet chili sauce, sriracha, honey, lime juice, and minced garlic until smooth and well combined.
If you prefer a thinner sauce, add 1-2 teaspoons of water. Taste and adjust the heat level by adding more sriracha if desired.
Arrange your bowls with the base layer of brown rice.
Arrange the shredded cabbage, carrots, and cucumber slices around the perimeter of the bowl, leaving space in the center for the chicken.
Place the cooked chicken in the center of each bowl.
Drizzle generously with the bang bang sauce, reserving some for serving on the side.
Fan the avocado slices along one section of the bowl.
Sprinkle the entire bowl with sliced green onions, cilantro, and sesame seeds.
Serve with lime wedges on the side for an extra burst of freshness.