Press SAUTE on the Instant Pot, and when it reads Hot, add the olive oil, kielbasa and chopped onion
Cook until onions are slightly soft, and add some broth to deglaze pot if necessary
Hit Cancel to turn pot off, then add rice over sausage, and add sea salt, garlic powder, pepper and smoked paprika
Pour broth over rice, and push down to make sure rice is covered with broth. Do not stir everything together.
Place lid on pot, make sure vent is on Sealing position, and hit PRESSURE COOK for 4 minutes. Pot will take a few minutes to reach pressure, then cook
When pot beeps, allow a 10 minute natural release, then quick release remaining pressure
When pin drops, remove lid, and stir in peas. Stir in shredded cheese, if desired, and serve