Heat the olive oil in the pressure cooker on the sauté setting.
Add the chopped onion and cook until translucent.
Stir in the minced garlic and sliced mushrooms.
Add the chicken thighs and cook for a few minutes until browned.
Sprinkle in the Arborio rice and toast for a couple of minutes.
Pour in the white wine, stirring until mostly evaporated.
Add the chicken broth, salt, and pepper.
Seal the pressure cooker and cook on high pressure for 10 minutes.
Once done, release the pressure and stir in the Parmesan cheese.