If the turkey breast is frozen, let thaw in refrigerator for 3 days in the wrapping it came in. Remove the gravy mix, if any. Rinse the turkey breast and let it drain in a colander. Pat it dry with paper towels. Loosen the skin on top of the breast with your fingers and a knife but do not cut it off.
Combine butter, herb seasoning, and salt in a small bowl. Using fingertips, spread about 2 tablespoons of the mixture up under the skin and onto the turkey breast. Lay the skin over the mixture then spread the remaining mixture on top of the skin.
Place the trivet in the Instant Pot 6 qt Duo pan and pour in chicken broth.
If the turkey breast has a cavity to place the onion and celery under the breast, place it there. If it is open, just place them in the Instant Pot pan and place the turkey breast, breast side up.