Place chicken breasts in a bowl and toss with oil.
Season chicken with salt, pepper, garlic powder, Italian seasoning and paprika. Toss to coat all pieces.
Add chicken stock to the Instant Pot and insert trivet and place chicken breasts on the trivet. Leave as much space as possible between the breasts for even cooking.
Close the Instant Pot lid and set valve to sealing. Set to pressure cook for 8 minutes. Keep warm setting should be off. Note: Instant Pot will take a bit to get up to pressure. Allow pressure to naturally release. Remove chicken from Instant Pot and let cool for 5-10 minutes. Place chicken breasts in a large bowl and shred using two forks.