Prepare chicken: Season chicken with salt, pepper, and Italian seasoning. Place in the crockpot.
Mix sauce: In a bowl, combine heavy cream, chicken broth, minced garlic, and butter. Pour over chicken.
Slow cook: Cover and cook on low for 3–4 hours or on high for 2–3 hours until chicken is fully cooked.
Shred chicken: Remove chicken from crockpot and shred with two forks. Return shredded chicken to the crockpot.
Add pasta and cheese: Stir in uncooked pasta and Parmesan cheese. Cover and cook on high for 15–20 minutes until pasta is tender. If using vegetables, add them with the pasta.
Finish and serve: Stir well to combine. Garnish with fresh parsley and extra Parmesan if desired.