Please show us that Jesus was talking about the Last Supper in John 6.
2,000 years of Christian teaching holds that Jesus was referring to the Eucharist which he instituted at the Last Supper.
You disprove it.
Verses 28 and 29?
BTW, the only answer to the question of whether the body Jesus indwells IN HEAVEN since the Ascension has come from a Catholic Priest who asserted the body in Heaven is a simple human body with flesh and blood! ... Contradicting clear teaching of the BIBLE, as per catholiciism's usual.