Sentience Platonism is the idea that experiences exist by themselves, regardless of the sentient beings who experience them. How is that possible? Our minds could be like radio receivers capable of connecting some “station”. The mind, as the radio-receiver, does not generate anything new, but connects to something that preexists.
Is it compatible with emergentism? No, it’s just the opposite. The “radio receivers” metaphor is a type of immersionism (the symmetrical hypothesis of emergentism). Is it compatible with the simulation hypothesis? Yes. Sentience Platonism can be reinforced by the idea that perhaps we live in a simulation and beings may be “instantiated” from an ideal object, in the same way as “instances” of software objects in “Object-Oriented Programming“.