Think about the innate idea of the iPhone. If we take innate ideas on face value, then the innate idea of the iPhone should have existed during Plato’s lifetime (or eternally according to the theory).
If this is true, then why didn’t we have the iPhone then, or even mention of it somewhere? Clearly this is nonsense. Innate ideas do not exist. We only have things as they come into existence and then known when experienced.