Select the saute function on the instant pot. Season your chicken with salt and Italian seasoning. Place the butter in the IP and saute for 2-3 minutes per side. Toss in the minced garlic for the final minute. Select cancel.
Pour the wine into the bottom of the Instant Pot and deglaze. Be sure to scrape the bottom of the pan to prevent the burn signal.
Secure the lid and cook on high pressure for 8 minutes. Use a quick release.
Remove the chicken. You can shred with a fork or break apart with a fork.
Select the saute function to keep the mixture hot. Mix in the arrowroot starch with the heavy cream, then pour into the Instant Pot. Dump in the parmesan cheese, sun-dried tomatoes, and spinach. Heat up until the parmesan is melted, spinach is wilted, and the sauce is slightly thickened. Add the chicken back in.
Season with salt and pepper to taste. Serve over rice, cauliflower rice, or pasta. Top with additional parmesan cheese and optional fresh basil.