Set the Instant Pot to sauté mode. Add 2 tablespoons of olive oil and the finely chopped mushrooms. Season with ¼ teaspoon of sea salt. Cook for 5-6 minutes until mushrooms release their liquid. Set mushrooms aside.
Add remaining 2 tablespoons of olive oil to the pot along with the diced onion, celery, and ¼ teaspoon of sea salt. Cook for 3 minutes, stirring frequently until onions soften. Add ground coriander and cook for another minute.
Add Arborio rice to the pot and cook for 1 minute, stirring constantly to coat and toast the rice evenly.
Pour in the dry white wine and cook for 1 minute, stirring constantly until the wine is absorbed.
Add chicken stock and 1 teaspoon of sea salt to the pot. Mix well.
Lock the lid and set the Instant Pot to cook at high pressure for 4 minutes.
Once cooking is complete, quick-release the pressure. Remove the lid and stir the risotto.
Stir in the grated Parmesan cheese until well combined.
Return the sautéed mushrooms (along with any liquid) to the pot and mix thoroughly.
Serve immediately and enjoy!