In a bowl, mix shredded cabbage, grated carrot, mayonnaise, lime juice, and salt. Chill while preparing other components.
Set up three bowls: flour in the first, beaten eggs in the second, and seasoned panko breadcrumbs mixed with paprika, garlic powder, cumin, chili powder, salt, and pepper in the third.
Dip fish chunks into flour, then eggs, then the seasoned panko mixture, pressing gently to coat.
Heat oil in a skillet over medium-high heat and fry fish pieces 2 to 3 minutes per side until golden and crispy. Drain on paper towels.
Alternatively, air fry the fish at 400°F (200°C) for 10–12 minutes, flipping halfway through.
Whisk together sour cream, mayonnaise, lime juice, hot sauce, and garlic powder until smooth to make the creamy taco sauce.
Assemble bowls by layering cooked rice, crispy fish, slaw, corn kernels, black beans, pico de gallo, and avocado slices.
Drizzle bowls with creamy taco sauce and garnish with fresh cilantro.
Serve warm with extra lime wedges on the side.