Select the High Sauté setting on the Instant Pot, add the coconut oil, and melt. Add the onion and sauté for 4 minutes, until the onion starts to brown. Add the coconut cream and curry paste and sauté for 2 minutes more, until bubbling and fragrant. Stir in the broth, using a wooden spoon to nudge loose any browned bits from the pot bottom, then add the squash in a single layer.