When Nicodemus approached Christ he wanted the Lord to furnish some proof that He was indeed the Messiah. As a recognized religious leader among the Jews, Nicodemus occupied a precarious position: He didn’t want to accept Christ when the other Jewish leaders rejected Him, but he also didn’t want to reject the Messiah if Christ were indeed the one foretold in prophecy.
Christ explained the matter by referring to prophecy: “They told you I would come, and I am now here doing what was prophesied, but you refuse to see it happening. Enough is underway that rejecting it means you prefer darkness to light. Humble yourself and admit the prophets foretold the very things now underway; repent and be baptized and the Spirit of Truth will open your eyes. If you want greater light, you will obey this instruction. If you refuse, then you never meant it when you greeted me as an enlightened heavenly guide.” T&C 171: TSJ 2:4.
Fulfilling prophecy in plain sight does not mean people can recognize it. Far more often it remains debated, rejected or unaccepted rather than welcomed.