Set Instant Pot to SAUTE. Once the pot has heated add the olive oil and chicken.
In a small bowl combine the garlic powder, onion powder, kosher salt, and Italian seasoning.
Sprinkle the seasoning over the chicken as it cooks.
Brown chicken for 5-7 minutes, stirring as it cooks to combine it with the seasoning. Once done set aside.
Pour the chicken broth into the pot and use a wooden spoon to help scrape up any browned bits from the bottom of the pot.
Add the heavy cream and nutmeg and stir together.
Place the broken in half fettuccine into the pot, fanning it out so it isn’t clumped together.
Place the cooked chicken on top of the pasta.
Lock the lid in place and turn the valve to SEALING. Set to HIGH pressure for 6 minutes.
When the timer goes off press CANCEL and let the pot do a 5 minute natural release. Then carefully turn the valve to VENTING and release the remaining pressure.
Remove the lid and add the Parmesan cheese stirring it into the sauce with the pasta and chicken. The sauce will thicken as you stir.