Put Instant Pot on saute (low) and add olive oil once warm.
Add diced chicken, carrots, celery, and garlic.
Mix around and allow to simmer for about 3-4 minutes, or until chicken is cooked slightly on outside and veggies are slightly tender.
Turn Instant Pot off.
Add chicken broth, uncooked pasta, Italian seasoning, seasoned salt, and pepper.
Stir and place lid onto Instant Pot securely, making sure it is locked closed.
Close valve (should be on sealed) and set Instant Pot to manual, pressure, high for 5 minutes.
When cook cycle is complete and beeps, allow to sit an additional 3 minutes before releasing valve.
Once steam has been released, carefully open lid, stir, and serve!