In a medium saucepan, combine rice, water, and 1/2 teaspoon salt. Bring to a boil, then reduce heat to low, cover, and simmer until water is absorbed and rice is tender, about 18 minutes.
Fluff the cooked rice with a fork and stir in olive oil and chopped cilantro.
In a separate bowl, mix the black beans, corn, and a pinch of salt, then heat them together in a microwave or on the stovetop until warm.
Prepare the other toppings: dice the cooked chicken, tomatoes, avocado, and red onion.
To assemble the burrito bowls, divide the cilantro rice among 4 bowls. Top each with equal portions of chicken, black beans, corn, tomatoes, cheese, avocado, and red onion.
Serve each bowl with a lime wedge for squeezing over the top.