Rinse rice. Combine wet rice and chicken broth in a multi-functional pressure cooker (such as Instant Pot®). Close and lock the lid and set valve to sealing. Choose Rice function. Allow 10 to 15 minutes for pressure to build.

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Release pressure carefully using the quick-release method according to manufacturer’s instructions, about 5 minutes. Unlock and remove the lid. Transfer rice to a bowl and keep warm.

Rinse out pot liner and choose Saute function. Add grapeseed oil, chicken, and sausage; saute until browned, 5 to 7 minutes. Add celery, bell pepper, and onion. Saute 1 more minute. Add tomatoes, Creole seasoning, and Cajun seasoning. Add shrimp and cook just until tails curl up, 1 to 3 minutes. Serve jambalaya on top of or mixed into the cooked rice.