Press SAUTE on the Instant Pot, and when it reads Hot, add the olive oil and cubed chicken pieces, and cook until no longer pink, stirring frequently
Add the sea salt, granulated garlic, pepper and Italian seasoning, and stir until well coated, then hit CANCEL
Pour uncooked tortellini over chicken, then pour water or broth over and around tortellini, and press down lightly with spatula
Place lid on Instant Pot, turn vent to Sealing position, and hit PRESSURE COOK for 4 minutes in the 6 quart. For the 8 quart, cook for 3 minutes. Pot will take a few minutes to reach pressure, then begin counting down and cook
When pot beeps, do a quick or gradual quick release. When pin drops, carefully open lid, and stir well
Pour in heavy cream, and sun dried tomatoes, and stir well. Then, stir in Parmesan cheese, and mix until mixture thickens and is creamy. Sauce will thicken as pasta cools
Stir in spinach, and serve immediately. Top with additional cheese, if desired