Have you EVER read John 6???????
I have read it and understand it well. I haven't met anyone who subscribes to the myth of transubstantiation who grasps it at all.
So please don't take any more bandwidth to impress me with an explanation that tries to say that the words of this chapter of this small book of the Bible does not demonstrate the epitome of Jesus' task of training the disciples in figurative-literal language used to illustrate a literal Bible Truth.
You might want to take a look at Revelation 10, especially verse 9, and see if a connection there appears to you, regarding literal language versus figurative-literal language, and how it relates to the Last Supper.
It does to a wise man, whose vocabulary includes the word "metaphor."
Jesus answered, âThe work of God is this: to believe in the one he has sent.â