Make the bang bang sauce: whisk together mayonnaise (or Greek yogurt), sweet chili sauce, honey, and sriracha (or gochujang) in a small bowl until smooth. Cover and refrigerate until serving.
Prepare bowls: steam rice, slice avocados, halve or quarter cherry tomatoes, and thinly slice the cucumber so everything is ready before frying the chicken.
Chop the chicken into 2-inch bite-sized pieces on a cutting board.
In a bowl, whisk the egg with the tablespoon of milk or water until combined.
On a plate or shallow bowl, combine both flours, garlic powder, sea salt, black pepper, and paprika; mix well.
Working in batches, dip several chicken pieces into the egg mixture to coat, then transfer to the flour mixture and toss to evenly coat. Place coated pieces on a plate and repeat with remaining chicken.
Heat 4 to 5 tablespoons avocado oil in a large 12-inch skillet over medium-high heat until shimmering; to test, carefully flick a drop of water—if it sizzles, the oil is ready.
Add the breaded chicken to the hot oil in a single layer (work in batches if necessary). Cook 3 to 5 minutes per side until golden brown and the internal temperature reaches 165°F (74°C).
Transfer cooked chicken to a plate lined with paper towel briefly to drain, then finish compiling bowls.
Assemble each bowl with steamed rice, sliced avocado, cherry tomatoes, cucumber, and crispy chicken. Drizzle desired amount of bang bang sauce over the top and serve immediately.