Where does the Bible claim that Moses' tomb would never be found? There's only one verse about it of which I'm aware and it says simply that "but no man knows his burial place to this day" (i.e. the completion of that particular book).
...more honest translations have "...no man will ever know his burial place".
The tomb is pretty well hidden, and the path to it leads from the holy shrine. Only high priests allowed into the presence of the Ark of the Covenant would even have access to it.
There is supposed to be more about it in the Book of Jasher (Jasher is the true King of the Jews, ruling from Petra: the armoured angelic man Joshua bows down to at Jericho). But sadly the Book of Jasher is one of many books that have been removed from the Christian Bible.
This is the big problem with translations aimed at Christian audiences, it panders to their conceits.
The god of Genesis is referred to as "God" when it should be "gods": plural, as it refers to the planetary gods; similar mistranslations conflate Yahweh (a storm god) with his companion Zodiac gods.
There's lots of this stuff... Exodus is full of such dishonest interpretations.
Plus, it appears you're late to the party again, as somebody else has claimed to have found Moses' tomb (ironically enough, it's the same place where Muslims claim Jesus is buried).
...Mary Magdalene, the Virgin Mary, Jesus, even Jesus' donkey are all supposedly buried in Kashmir too. All with good provenance and traditions dating back to the first century.
...Mary Magdalene and the Virgin Mary are also buried in southern France. Again, all with good provenance and traditions dating back to the first century.
...Jesus and his brother, James the Just, are also buried in Japan. Where their descendants (hundreds of thousands of them) maintain such a tradition.
...here in Europe we even had three tons of the One True Cross spread across all Christendom. All gathered by hand by the very same Christian saint who supposedly made Christianity the national faith of the Roman Empire... these bits even cured the sick and performed miracles: ALL of them.
But you don't need to address any of this.
What you believe is factually true in its entirety; even the mistranslations; even the misspellings. But not the stuff that had been edited out of your Holy Book by the time you read it... when you read it it became perfectly accurate and wholly true. It's the people who believed in the other versions of this book throughout history who were wrong.
Yours and yours alone is the sole true and accurate religion out of the 34,000 current variations of Christianity.
The Luke