Add the chicken to a crockpot and pour the garlic parmesan sauce over the top. Fill the empty sauce bottle up with milk or heavy cream and shake to loosen up any remaining sauce and pour it into the crockpot.
Allow any TikTok Garlic Parmesan Chicken Pasta leftovers to cool, and then transfer them into an airtight container. Store the leftovers in the fridge and enjoy them for up to 3 days.