Place carcass in Instant Pot. Add veggies and water to cover everything by an inch or so.

Cover and set pressure to manual and high for 1 hour. At end of hour, manually release pressure. Open lid and remove all bones and veggies. Pick all meat off bones and reserve.

Strain broth through fine mesh sieve. Pour into a large pot, add 2 bay leaves, thyme, salt and pepper, diced onions, diced celery and diced carrots. Add 2 quarts water.

Bring to boil, turn down to simmer. Simmer for 1 1/2 hours. Add reserved turkey meat.