Preheat your grill to medium-high heat, around 375°F (190°C). In a bowl, combine shrimp with olive oil, garlic powder, onion powder, salt, and pepper.

Grill the seasoned shrimp for 2-3 minutes on each side until pink and opaque, then set aside.

In a separate bowl, mix diced mango, red onion, jalapeño, cilantro, and lime juice. Add salt and pepper to taste, chill for 10-15 minutes.

In another bowl, whisk mayonnaise, sriracha, and lime juice until smooth; adjust spiciness to taste.

Assemble bowls with rice, grilled shrimp, sliced avocado, and mango salsa, then drizzle with lime-chili sauce.

Serve immediately with lime wedges, toasted sesame seeds, and sliced green onions.