Cook the rice. Make your rice according to package directions. Fluff with a fork, then stir in lime juice, cilantro, and a pinch of salt.
Set aside, covered, to keep warm.
Season the chicken. Pat chicken dry. In a small bowl, mix chili powder, cumin, smoked paprika, garlic powder, onion powder, salt, and pepper. Toss chicken with olive oil and the spice blend until evenly coated.
Sear the chicken. Heat a large skillet over medium-high.
Add the chicken and cook 4–6 minutes per side, until browned and cooked through (165°F internal). Transfer to a cutting board to rest, then slice or dice.
Char the corn. In the same pan, add 1 teaspoon olive oil. Add corn and cook undisturbed for 2–3 minutes to get some char.
Stir, then cook 2–3 minutes more with jalapeño, chili powder, and a pinch of salt. You want golden spots and a toasty aroma.
Make the drizzle. In a small bowl, whisk Greek yogurt, mayonnaise (if using), lime juice, chili powder, smoked paprika, grated garlic, and salt until smooth. Adjust lime and salt to taste.
Assemble the bowls. Divide rice among bowls.
Top with sliced chicken and a generous scoop of charred corn. Spoon the creamy drizzle over the top.
Finish with toppings. Add cotija, cilantro, red onion, and a squeeze of lime. Include avocado slices or hot sauce if you like extra creaminess or heat.