In the Instant Pot, turn the saute function on and add butter. Once it's mostly melted, add onion, celery, carrots, and seasoning. Cook until onions begin to turn translucent, stirring, about 5 minutes.
Add white wine and cook an additional 1-2 minutes before adding chicken, potatoes, broth, tomatoes, green beans, and bay leaves.
Lock the instant pot lid into place with the pressure valve closed. Set the manual setting for 10 minutes on high. The pot will take about 10 minutes to come to pressure before the time starts. After the cook time is up and the alarm sounds, let the pot natural release, about another 20 minutes.
Notes
Click on the time in the instructions to start a timer!Don't open the electric pressure cooker before the pressure is released. Also avoid using the steam release valve with high liquid items like soups and stews, and natural pressure release instead.