Place your cranberries, orange juice, and cinnamon stick into the Instant Pot.
Secure lid and set pressure valve to SEALING.
Cook on HIGH PRESSURE for 2 minutes.
Press CANCEL.
Quick-release the pressure valve.
Press SAUTE.
Stir in the sugar (or sugar substitute) and grated orange peel.
Cook, stirring frequently, until cranberries burst and sauce is thickened (about 5 minutes).
Press CANCEL.
Remove from the Instant Pot and allow to cool completely.
Refrigerate until ready to serve. It will thicken further in the refrigerator.
Notes
You can adjust the sweetness to your liking. Be sure to taste as you go! The nutrition facts listed for this recipe are based on using actual sugar, not a sugar substitute.