Add the chicken, cream cheese, sour cream, cheddar, jalapeño brine, fresh jalapeños, onion powder, garlic powder, smoked paprika, salt, and pepper to the slow cooker.
Cook on LOW for 2–3 hours, stirring once or twice, until fully melted, creamy, and cohesive.
Switch the slow cooker to WARM for serving.
Right before serving, sprinkle the top with crushed Cheez-Its, bacon bits, and scallions. Do not stir — let it act as a garnish.