In ceramic baking dish, toss rhubarb, sugar, orange juice, zest, star anise and cinnamon to combine. Place baking dish on trivet.
Place 1 cup water in an Instant Pot. Lower trivet with baking dish into inner pot.
When the cook time is up, manually release the pressure. Use gloves to remove the trivet. Set rhubarb aside to cool down.
Lock on the lid and make sure the pressure valve is set to seal. Use the manual function to set to cook for 5 minutes on LOW pressure.
In the inner pot, stir together the rice, coconut cream, water, sugar, cinnamon stick, and salt.
Lock the lid into place and cook on HIGH pressure for 10 minutes. Let the pressure release naturally for 10 minutes, then manually release the remaining pressure.
Open the lid and discard the cinnamon stick. Add in additional coconut cream or water to get the consistency you like.
Spoon the pudding into serving bowls, top with rhubarb compote, and fresh orange zest.