In a large mixing bowl, combine the shredded chicken, cream cheese, 1/2 cup of Monterey Jack cheese, cauliflower rice, sour cream, chicken broth, garlic powder, onion powder, cumin, salt, and black pepper. Mix until well combined.
Lay out the large lettuce leaves on a flat surface. Spoon about 1/4 cup of the chicken mixture onto each leaf and roll tightly, folding in the sides to secure the filling.
Place the rolled enchiladas seam-side down in a greased 9x13 inch baking dish.
In a separate small bowl, combine the remaining 1/2 cup of chicken broth and 1/4 cup of Monterey Jack cheese. Pour this mixture evenly over the rolled enchiladas.
Cover the dish with aluminum foil and bake in the preheated oven for 20 minutes.
After 20 minutes, remove the foil and bake for an additional 10 minutes, or until the cheese is bubbly and slightly golden.
Remove from the oven and let cool for a few minutes before serving. Garnish with chopped fresh cilantro if desired.