Add the chicken breasts or thighs to the crockpot.
Season with salt, pepper, garlic powder, onion powder, and Kinder’s Buttery Garlic seasoning.
Add the frozen mixed vegetables and cream of chicken soup.
Pour in the chicken broth and stir everything together.
Cover and cook on low for 6–7 hours or high for 3–4 hours, until the chicken is fully cooked and tender.
Shred the chicken and return it to the crockpot.
Stir in the heavy cream and sour cream if using. Cook another 10–15 minutes on high until creamy and heated through.
Bake the biscuits separately according to the package directions.
Spoon the chicken pot pie filling over hot biscuits and serve warm.