What is the authenticity of the narration that Heraclius showed pictures of the prophets to the Companions, which is mentioned in Ibn Kathir's Tafsir when interpreting the verse (those who follow the Messenger, the unlettered Prophet)?

The story of some Companions seeing images of the Prophets, including an image of our Prophet Muhammad, peace and blessings be upon him, with the Roman Emperor, is a weak and unsound story. This is because it has been narrated through four different chains, none of which are authentic. Each chain is either very weak or contains a continuous series of weak narrators and unknown individuals.