Nobody "Bites Christ" in John 6.
Christ did not say "someday in the future my flesh will be food" in John 6 -- He said it already WAS and that He already WAS the bread that came down out of heaven.
THEN in John 6 He explains the SYMBOL - by saying that
"literal flesh is worthless - my WORDS are spirit and are life".
In Matt 16 the disciples get smacked-down because they took the symbol of bread "TOO literally" and later realized that by that SYMBOL Christ meant "teaching".
It is plainly stated so in Matt 16.
So then - no "biting Christ" in John 6.
And no "Confecting the body soul and divinity of Christ"
CATHOLIC ENCYCLOPEDIA: The Real Presence of Christ in the Eucharist
All such man-made-doctrines are not found in the Bible.