Maybe the person tasked with digging up Jesus’ body really didn’t want to do it. He tried a little bit. And then maybe he went back to the religious leaders and said, Oh, my God, it’s such stinking bodies, it’s not going to convince anyone of anything.
And religious leaders tend to be more verbal and contemplative, and not active.
Or, maybe they did present Jesus’ decayed body, and Peter or James said, No, that’s not Jesus. People who want to believe are highly motivated to keep believing.
Things could have happened a lot of different ways.