Season the chicken. In a bowl, toss chicken pieces with oil, smoked paprika, garlic powder, onion powder, cumin, salt, and pepper.
Coat evenly.
Cook the chicken. Heat a large skillet over medium-high heat. Add chicken and cook 6–8 minutes, stirring occasionally, until browned and just cooked through.
Add BBQ sauce. Reduce heat to medium, pour in the sugar-free BBQ sauce, and stir to coat. Let it simmer 2–3 minutes until glossy and slightly thickened.
Remove from heat.
Prepare the cauliflower rice. In another skillet, melt butter or ghee over medium heat. Add riced cauliflower and a pinch of salt. Sauté 4–5 minutes, just until tender but not mushy.
Set aside.
Mix the ranch drizzle. Whisk mayo, sour cream, lemon juice, dill, garlic powder, salt, and pepper. Add a splash of water to reach a pourable consistency.
Prep the fresh toppings. Thinly slice cabbage and red onion. Slice avocado.
Chop cilantro. Set out lime wedges and pickled jalapeños.
Assemble the bowls. Add a bed of cauliflower rice to each bowl. Top with BBQ chicken, shredded cabbage, onion, avocado slices, jalapeños, and cilantro.
Finish and serve. Drizzle with ranch and an extra spoonful of BBQ sauce if desired.
Squeeze fresh lime on top for brightness and serve warm.