Add cranberries, zest, cinnamon, and juice to your Instant Pot. Then pour maple syrup over the berries, but do not stir.
Close the lid and set steam release knob to sealing position.
Press the Pressure Cook (or Manual) button or dial, and +/- to select 2 minutes (High pressure). When cooking cycle finishes, let the pressure naturally release for ten minutes.
Manually release remaining pressure/steam, then open and stir sauce very well. Taste, and if you like it sweeter, add more maple syrup, 1 Tbsp at a time, stirring well.
Transfer to a serving dish and chill. It will thicken as it cools.