In my opinion and comprehending. Jesus took the Passover festival to reveal that He was and is the tree of life as per the book of Genesis 3: 21-22; and I quote: “The man has now become like one of us, knowing good and evil. He must not be allowed to reach out his hand and take also from the tree of life and eat, and live forever.” The Lord said.
Now, according to the book of John 6: 51; in the New Testament, and I quote: “I am the living bread that came down from heaven. If anyone eats of this bread, he will live forever. This bread is my flesh, which I will give for the life of the world.”
So, that why there was no meat in the Lord’s last supper signifying that heaven will not have killing or death of any kind of living creature.