Start with swtiching on the Instant Pot and turn on the Saute mode on.
When the pot is hot, add oil.
To the hot oil add Chicken, red chilli flakes, smoked paprika, Italian seasoning and salt.
Saute for 5-6 minutes. When it no longer looks pink, there are brown patches, remove it from the pot and keep it covered(to prevent it from drying).
To the instant pot add rest of the oil, chopped onion and minced garlic.
Saute for 2-3 minutes until it has softened and no more raw smell.
Add water to the pot and scrape the bottom of the pan to release any stuck brown bits.
Add pasta to the pan. Don't stir.
Top it with Pasta sauce, making sure it covers the pasta. If required using a spatula push down the pasta, so that it is completely submerged in the liquid.
Close lid, Set the Instant pot to Manual / High-pressure mode and set time to 4 minutes.
It will take about 7-8 minutes for the Instant pot to come to full pressure, then the timer will start.
Once the timer is off, let it rest for about 5 minutes and let the pressure release naturally.
Then, carefully release the remaining pressure manually.
Add cooked chicken along with any liquid in the bowl, heavy cream and parmesan cheese.
Stir it gently, until everything is incorporated well.