Set the Instant Pot to saute, add the olive oil, and brown the Cajun-seasoned chicken cubes.

Add the broth and dry penne, making sure the pasta is mostly submerged.

Seal the lid and pressure cook on high for 5 minutes, then do a quick release.

Switch back to saute and stir in the heavy cream and Parmesan until the sauce thickens.

Let it rest a few minutes to come together before serving.