https://coldcasechristianity.com/writings/the-truth-about-easter-is-the-resurrection-a-late-legend/
In order for the Resurrection of Jesus to be a late legend, the story would have to be both late and a legend. It is neither. It’s a lot harder to lie about something when people are still alive to expose the deception. The accounts of the Resurrection were written while people who would have known better could still fact-check them. Despite this truth, the earliest New Testament documents include the Resurrection story, and the record of the early Church fathers demonstrates that the account was not altered over time.