Dump pasta in the Instant Pot and cover with water. Add the drained tuna, frozen peas, and soup. Close the lid, set to Manual High Pressure for 4 minutes.

While that portion of the meal is cooking, consider browning some breadcrumbs in a pan by adding a little butter (or oil) to them and stirring until browned.

When the IP beeps, do a quick release. Then stir in the cheese and serve!