Place chicken, broth, buffalo sauce, and seasonings in the Instant pot.
Set the pressure to 30 minutes.
Do a quick release to release the pressure.
Remove chicken to shred with two forks
Set aside chicken
Whisk together corn starch and water and add to Instant pot
Add in cream cheese and shredded cheese
Whisk until cheese and cream cheese is all combined, smooth, and melted
Break the pasta in half and Place the pasta in the Instant pot uncooked
return the chicken and stir to combine.
Cover and Set the valve to sealing.
Set the pressure for 2 minutes.
When finished, do a quick release to release the pressure.
Stir to combine.
Garnish with fresh parsley if desired and serve immediately