“The perpetrators attempted to avoid creating explicit evidence and they also tried to destroy the documentary and material evidence of their crimes before the German defeat.[4][8] Nevertheless, much of the evidence was preserved and collected by Allied investigators during and after the war, and the overwhelming evidence of the crimes ultimately made such erasure attempts futile.” Wikipedia

In the digital age, it might be easier to destroy records. The Secret Service destroyed their records after January 6th.

There was some other news today about the Trump administration deleting a public facing record, but I think that is bit of a separate issue. This is more about rewriting history on public-facing websites, not destroying internal records.