This bodily resurrection of the saints is truly an amazing event;no wonder it draws so many differing interpretations We could ask what became of these saints, but the bible does not say, and God does not make revelations to satisfy curiosity. I don't think (but could easily be wrong) that the passage is saying that they arose on Christ's death and stayed in their graves until after His resurrection, but rather that historically, after His resurrection, they arose and appeared in Jerusalem. Also it is a question of the bodies of saints — a precious anticipation of the first resurrection Rev 20 v5, when death will be swallowed up in victory.
Christ had on the cross opened the way to God for faith, rending the veil. He had taken away the sting of death and made it, for faith again, a very weak power. He also there disposessed the devil of his power over death and now has the keys of hell and death. No wonder the saints couldn't wait to rise.
We could ask "which saints were they?' Again not a lot to go on, except that they appeared unto many in Jerusalem, where they had been buried (or is this presumtious?).This would exclude Daniel and Ezekiel, who died in captivity in Babylon; Jeremiah was thought to have died in Egypt. Moses was buried by God outside the land of promise, and Elijah and Enoch were 'translated so that they did not see death". But Jerusalem was notorious for stoning the prophets. The Fathers were buried in the cave of the field of Machpelah at Mamre.
Perhaps King David was there who said: "As for me, I will behold thy face in righteousness: I shall be satisfied, when I awake, with thy likeness" Psalm 17.
Jerusalem was and will be again a holy city and the Lord delights in her, so it is not surprising to see the first fruits of resurrection coming from her.