But when the archangel Michael, contending with the devil, disputed about the body of Moses, he did not presume to pronounce a reviling judgment upon him, but said, “The Lord rebuke you.” (Jude 1:9)
The subject is judgement, not the body of Moses. Jude is using the dispute between the archangel and satan as an example of how an angel did not presume judge even satan but deferred to God’s legitimate authority as judge.
Much is made of the passage about a dispute over Moses’ body. I think it is a reference to a contemporary belief which may have been lost to time. There is much speculation about the verse but nothing conclusive, although many will be ready to give you their interpretation with absolute certainty