Add the diced red and green bell peppers, cooking for 3 minutes until slightly softened.
Stir in the rinsed rice, Cajun seasoning, and chicken broth. Scrape the bottom of the pot with a wooden spoon to remove any browned bits.
Seal the lid and cook on high pressure for 7 minutes. Follow with a 5-minute natural pressure release, then carefully quick release the remaining pressure.
Open the lid, stir in the shrimp, cover the pot again, and let sit for 5 to 7 minutes until the shrimp are pink and cooked through. Garnish with chopped scallions and parsley before serving.