Place a trivet in the bottom of the Instant Pot. Add water, meatballs, pasta sauce, Italian seasoning, and parsley. Smooth the sauce over the meatballs, mixing in the seasoning.
Seal the pressure cooker and cook on high pressure for 5 minutes followed by a quick release. Carefully remove the trivet and return the meatballs to the pressure cooker liner.
Notes
Storage: Store leftover meatballs in the fridge in an airtight container for up to 5 days. To reheat, cover the meatballs with a paper towel and microwave in 30-second intervals.Food safety: Fully-cooked frozen meatballs should be reheated to a minimum internal temperature of 165°F/74°C.