Heat olive oil in a large skillet over medium heat. Add the chicken and season it with garlic powder, onion powder, salt, and pepper.
Cook until browned and cooked through, about 6-8 minutes. Remove and set aside.
Add onion, bell pepper, and garlic to the same skillet. Cook until softened, about 4 minutes.
Stir in the cauliflower rice, diced tomatoes with green chilies, chili powder, cumin, smoked paprika, salt, and pepper. Cook for 5-6 minutes, stirring occasionally, until the cauliflower rice is tender.
Add the cooked chicken back into the skillet. Sprinkle the cheese on top, cover, and cook for another 2-3 minutes until the cheese melts.
Top with chopped cilantro and any optional toppings you like.