Add chicken broth and chicken to the Instant Pot. Add the Italian seasoning, garlic powder, onion powder, salt and pepper.
Place the lid on the Instant Pot and lock it. Make sure the lever is set to seal. Press the manual button and set the time for 10 minutes.
When the time is up let the pressure manually release for 10 minutes, then release the pressure and remove the lid.
Remove the chicken and shred it with a fork. Place the chicken back in the liquid until you are ready to serve it.
While the chicken is cooking spray a pan with no-stick spray and cook onion and green pepper until crisp/tender.
Assemble sandwiches by adding the chicken to the bun, onion, green peppers and a slice of cheese. Place under the broiler until the cheese is melted. Enjoy!