Ah yes, forget that little detail that the Passover celebration of Jesus (the Last Supper) is a "meal" in which a SACRIFICIAL victim lamb is consumed in order to stave off death.

The entire text of the Last Supper accounts in the Gospel centers around Jesus invoking a New Covenant in which He is obviously the sacrificial victim ("this is the cup of my blood POURED OUT for the sins of many...")

Jesus is the new sacrificial lamb which must be eaten just as in the first Passover in Egypt when the Israelites were commanded to consume the victim lambs in their entirety.

The Apostles and the Gospel writers  only understand what Jesus is doing on Holy Thursday through Good Friday as a re-working of that first Passover. If you plainly asked them "what just happened there?" they would have each said "it seems like Jesus made Himself into the new sacrificial Passover lamb".