Add chicken, broth, beans, spices, chiles, salsa, and corn to Instant Pot.
Seal lid. Cook on Manual/Pressure Cook for 10 minutes.
Natural release 10 minutes, then quick release.
Meanwhile, make white sauce: melt butter, whisk in flour, cook 2–3 minutes.
Slowly add milk and bouillon. Simmer until thickened.
Remove chicken, shred, and return to pot. Stir in white sauce and sour cream.
Season to taste. Serve hot with desired toppings.
See full steps with tips & photos → https://theboatshedcafe.com/instant-pot-white-chicken-chili-2/