Set your Instant Pot to Sauté on High and add the olive oil. Once it’s hot, toss in the bell peppers, celery, onion, sausage, and all the seasonings—Cajun seasoning, garlic, salt, thyme, paprika, and oregano. Sauté for 3–5 minutes, just until it smells amazing and everything starts to soften up.
Pour in the soy sauce, chicken broth, and water to deglaze the pot. Scrape up all the browned bits from the bottom (this step is important to avoid the dreaded burn notice!).
Stir in the rice, then turn off the Sauté function.
Lock the lid in place and set the valve to Sealing. Pressure Cook on High for 10 minutes, then let it naturally release for 5 minutes before opening the lid.