Add oil to a large skillet set over medium heat and saute the onion and green pepper until onion is translucent, around 5 min. Add garlic and cook for around 30 seconds until fragrant.
Add chicken, paprika, cumin, onion powder, garlic powder, and ⅓ cup of enchilada sauce to the pan and stir to combine, then remove from heat.
Pour around ⅔ cup of enchilada sauce in your baking dish, just enough to coat the bottom.
Fill tortillas with chicken filling and approx 1 tablespoon of shredded cheese. Then roll and place in the baking dish with the seam side down . Repeat with remaining tortillas.
Top the enchiladas with remaining sauce, then remaining shredded cheese. Cover with foil and bake at 350℉ for 20 minutes. Remove foil and bake for another 5-10 minutes until the cheese is melted and the sauce is bubbling.