Check Chicken Breasts' Internal Temperature:
Place chicken breasts on a chopping board, then check their internal temperature at its' thickest part with an accurate food thermometer. Give it a few minutes rest as the temperature rises to 165°F.
*Note: The USDA recommends 165°F (74°C) as the safe internal temperature for cooked chicken.
*Pro Tip: If the temperature is off by more than 10°F, quickly place the chicken breasts back in Instant Pot. Close the lid, then let the residual heat in Instant Pot cook the chicken breasts for 1 - 2 more minutes.