Preheat oven to 400°F (204°C).
Toss cubed sweet potatoes with 1 tablespoon of olive oil, salt, and pepper on a large rimmed baking sheet.
Season chicken breasts with remaining olive oil, garlic powder, and smoked paprika.
Place chicken on a separate baking sheet or the same sheet if space permits.
Roast for 25 to 30 minutes until sweet potatoes are fork-tender and chicken reaches an internal temperature of 165°F (74°C).
Remove from oven and allow chicken to rest for 5 minutes before shredding with two forks.
In a medium bowl, combine shredded chicken with BBQ sauce until evenly coated.
Divide roasted sweet potatoes, BBQ chicken, black beans, and corn into four meal-prep containers or bowls.
Top each bowl with diced red onion and fresh cilantro.