In a large bowl, toss the chicken cubes with 1 tablespoon of olive oil, chili powder, cumin, garlic powder, and salt.
Heat a large skillet over medium-high heat. Add the chicken and cook for 6 to 8 minutes, stirring occasionally, until browned and the internal temperature reaches 165 degrees Fahrenheit.
Remove the chicken from the skillet and set aside. Wipe the skillet clean and add the remaining 1 tablespoon of olive oil.
Add the corn kernels to the skillet in a single layer. Cook undisturbed for 3 to 4 minutes to achieve a dark char, then stir and cook for another 2 minutes.
In a small mixing bowl, whisk together the mayonnaise, crema, and lime juice.
Transfer the charred corn to a medium bowl. Fold in the mayonnaise mixture, 0.25 cup of cotija cheese, half of the cilantro, and smoked paprika.
In a separate bowl, fluff the warm cooked rice and stir in the lime zest and the remaining cilantro.
Assemble the bowls by layering the cilantro-lime rice at the bottom, followed by the seasoned chicken, the street corn mixture, and avocado slices.
Garnish with the remaining cotija cheese and serve immediately with extra lime wedges.