Add the cream of mushroom and cream of celery soup to the Instant Pot. Mix together.
Add the chicken broth, garlic powder, onion powder, parsley and pepper. Stir together.
Add the egg noodles. Stir them in the liquid so they all get wet. The noodles will not be submerged by the liquid, but that is ok.
Drain the liquid from the tuna, then add it to the Instant Pot. There's no need to stir it at this point.
Place the lid on the Instant Pot and lock it. Make sure the lever is set to seal. Press the manual button and set the time for 3 minutes.
Release the pressure and remove the lid.
Stir the noodles, then add the half and half and peas. Continue to stir until the peas are heated through, it should only take a minute. Enjoy!