The Kinderhook plates have been controversial ever since 1843. Apologists and critics have debated the historical facts and extrinsic evidence for years.
Yesterday I did an interview about them on the Mormon Book Reviews channel on YouTube. See it here:
The show notes have some useful references.
BTW, if you haven't subscribed to the Mormon Book Reviews channel, you should now. Steve is an effective, interesting, and interested interviewer who seeks ways to build bridges and understanding among people of all beliefs.