Set the Instant Pot to Saute and add the celery, spinach, onion, and garlic. Cook until the onions are soft and translucent, about 5 minutes. Add the chicken broth and water.
Season the chicken with desired amounts of salt, pepper and spices and add it to the pot.
Place the lid on the pot and ensure the pressure release valve is sealed. Hit Cancel, then hit Pressure Cook and set the timer for 8 minutes. When the time is up, flip the quick release valve.
Open the lid and switch the Instant Pot to Soup mode.
Add the cream, stir until well combined.
Let the stew simmer for about 5 minutes, if it begins to bubble, hit cancel, then hit warm.
Garnish as desired and serve!