Season the chicken: In a bowl, toss sliced chicken with oil, taco seasoning, cumin, smoked paprika, garlic powder, onion powder, salt, pepper, and lime juice. Let it sit while you prep the rest, about 10 minutes.
Make the sauce: In a small bowl, whisk yogurt (or sour cream), mayo, lime juice, hot sauce, and a pinch of salt.
Adjust to taste and set aside.
Cook the cauliflower rice: Heat 1 tablespoon oil in a large skillet over medium-high. Add cauliflower rice, a pinch of salt, and cook 4–6 minutes, stirring, until tender and lightly toasted. Remove to a bowl and keep warm.
Sear the chicken: In the same skillet, add the marinated chicken in an even layer.
Cook 4–6 minutes, stirring occasionally, until browned and cooked through. If the pan is crowded, cook in two batches.
Prep fresh toppings: While the chicken cooks, slice tomatoes, onion, jalapeño, and avocado. Shred lettuce and chop cilantro.
Assemble the bowls: Add a bed of cauliflower rice and greens to each bowl.
Top with chicken, tomatoes, onion, avocado, cheese (if using), and jalapeño. Drizzle with the creamy taco sauce and add cilantro and lime wedges.
Taste and adjust: Finish with an extra squeeze of lime and a sprinkle of salt if needed.