Grease or coat with non-stick spray, a 15cm (7-inch) springform cake tin. To further prevent the cheesecake from sticking I suggest adding a parchment round to the bottom.
Pour approximately half of the carrot cake mixture into the cake tin.
Pour approximately half of the cheesecake mixture to the cake tin.
Add the remaining carrot cake mixture and then the remaining cheesecake mixture.
Place a kitchen towel on top of the cake tin and loosely cover with tin foil.
Place the trivet in the instant pot and add 300ml (1.5 cups) of cold water.
Make a sling using tin foil and use it to lower the cake tin into the instant pot.
Put the lid on and set to high pressure for 33 minutes. Allow to naturally release for 20 minutes.
Remove the cake tin from the instant pot and place on a cooling rack. Remove the foil and kitchen towel and gently dab away any water from the surface of the cheesecake.
Leave the cheesecake to cool completely.