Slice the sausage into 1/4" thick rounds.
Turn the Instant Pot on and click the sauté setting.
Once hot (about 6-7 minutes), add the oil and turn to coat.
Add the sausage and brown on both sides (about 5 minutes). Once browned, transfer to a paper towel lined plate. Do not remove the left over grease.
Add the onions to the pot followed by the creole seasoning. Sauté until tender and translucent (about 5 minutes).
Add the celery and garlic and stir to combine. Cook for 2-3 minutes until the celery is tender.
Add the beans and sausage and stir to combine.
Add enough water to cover the bean mixture (approx. 4 cups).
Add the bay leaves, thyme, oregano, parsley, paprika, garlic powder, cayenne, sage and black pepper to the pot. Stir to combine.
Place the lid on the pot with the valve in the sealed position.
Press the "cancel" or "off" button and set it to "High Pressure" for 35 minutes.
Naturally release once finished and check the beans for doneness. The beans should yield easily when pressure is applied. If they're still a bit firm for your liking, cook for another 2-3 minutes (NPR).
Stir in the salt and extra creole seasoning to your preferred liking. Start with 1 tsp. of salt and go from there.
Serve immediately over white rice and garnish with green onions and Tabasco sauce (optional).