I don’t think we need to state outright that Palpatine is in a clone body, personally. In the huge mess of tangle and confusion that is TROS, the one bit of tangle and confusion that works in its favour is how and what exactly Palpatine is, at least in my opinion - the small amount of ambiguity (I think it’s the exact right amount now we’ve got the Palpatine clones in the Pickled Snoke tank) gives him that same atemporal sense of “how does this work” that makes the concept of ghosts unsettling.