Hebrews 8:13 “When He said, “A new covenant,” He has made the first obsolete”
Luke 24:43-45 "“Then He said to them, “These are the words which I spoke to you while I was still with you, that all things must be fulfilled which were written in the Law of Moses and the Prophets and the Psalms concerning Me.” 45 And He opened their understanding, that they might comprehend the Scriptures.”
When Jesus is dying His Sacrificial death on the cross, He states in John 19:30 “It is finished (consummated).”
Jesus has now fulfilled all of the prophecies which were written about Him in the Old Testament Scriptures about His birth, life, suffering, and death on the cross. The Old Covenant is now made obsolete by His death since He is the perfect Sacrifice and so Jesus’ New Covenant now replaces the Old Covenant. The Old Covenant is now fulfilled. It is finished (consummated).
The New Covenant is hidden or veiled in the Old Covenant and the Old Covenant is fulfilled and made obsolete by the New Covenant.