Add pumpkin purée, onion, garlic, chicken broth, heavy cream, Parmesan cheese, thyme, smoked paprika, salt, and pepper to the slow cooker. Stir to combine.
Cover and cook on low for 6 hours or on high for 3 hours.
When done, blend the soup until smooth using an immersion blender or carefully transfer to a blender in batches.
Taste and adjust seasoning if needed.
Ladle into bowls and top with a drizzle of cream and crispy bacon crumbles. Serve hot.