Add all of the ingredients except for the zucchini and basil leaves to the Instant Pot.
Secure the lid, close the pressure valve and cook for 10 minutes at high pressure.
Naturally release pressure.
Using two forks, shred the chicken.
Stir in the zucchini - it’ll warm up on it’s own but if you’d like for the zucchini to be tender, press sauté and cook until tender.
Top with basil leaves and parmesan and a dollop of ricotta if desired (highly recommend!).