Turn on the sauté setting and melt the butter. Add onion, carrots, celery, and garlic. Cook till soft and smelling good.
Place the chicken on top of the veggies. Add the salt, pepper, and Italian seasoning. Pour in the chicken broth.
Close the lid and cook on high pressure. Let it do its thing while you breathe for a minute.
Carefully open the lid. Take out the chicken and shred it with two forks. Put it back in the pot.
Mix flour and heavy cream in a small bowl. Slowly pour it into the pot and stir till the soup gets creamy and thick.
Scoop into bowls. Add parsley if you want to feel cute.