Add the chicken, heavy whipping cream, chicken broth, butter, garlic powder and cajun seasoning into at least a 6 quart instant pot.
Seal and cook on high pressure for 17 minutes with a quick release and make sure that the chicken is cooked through (has an internal temperature of 165 degrees F).
Remove the chicken from the instant pot and shred or dice it into large pieces.
Whisk the sauce in the instant pot. Return the chicken back to the crock pot and stir in the uncooked pasta.
Seal and cook on high pressure for 3 minutes with a quick release.
Then stir in the parmesan cheese. Allow the heat from the meal to melt the parmesan cheese (do not turn the instant pot back on).
Serve warm and enjoy.
Notes
If you are sensitive to spice, reduce the cajun seasoning in half in this recipe. Refrigerate the leftovers in an airtight container for up to 5 days. When the pasta is cooking, make sure to release the pressure immediately to prevent the pasta was getting soggy in the instant pot.