There was a bodily resurrection of the OT believers, because they left sheol, Abraham's bosom and entered Paradise when Jesus ascended on Sunday, before Jesus ever visited the upper room post resurrection. This "physical" resurrection also covered, because of the Atonement, all future physical resurrections for those in Christ. Paul had to re-explain it in 2 Corinthians 5, because 1 Corinthians 15 was misunderstood. No one missed the last day resurrection from OT Scriptures. It was not for post Cross believers. The OT believers had to wait for the last day of the OT, which was the Cross. Many claim the Resurrection found in OT passages for the last day is the Second Coming last day. No, the Cross was the last day OT event. No human soul could enter Paradise, the Garden, until Jesus claimed, "It is finished" on the Cross. Now, because of the Cross and the Atonement all were given incorruptible bodies to enter and enjoy Paradise again.
That is what Paul explains in 2 Corinthians 5. This body returns to dust, but we have an incorruptible body that we step into when we go from this life to the next life. There is no waiting in sheol any more like they did in Abraham's bosom. That is why Adam died physically the second he ate. His body immediately went from an incorruptible body to a sin corrupted body. It happened immediately, but in reverse to how we now go from this body to the next. But Paul was the one to explain this of the church. The disciples, except perhaps John were more devoted to the effect of the Gospel in the here and now. They did not focus on the afterlife. But the Greeks and Roman philosophers had more questions about all aspects of the Gospel and that is why Paul addressed things in his letters of questions from a wider audience. There was really no changing of the minds of the religious Jews. They objected to every thing about this new Messianic group of believers.
