the discovery that this highly sensitive intelligence had been illegally retained in his private office"
and
"Had it not been for the IG’s notification, it is doubtful that Biden’s illegal retention of classified information would have been reported to the Justice Department at all. And there is every reason to believe the public would never have been told."
That pretty much covers it.
https://www.nationalreview.com/2023/01/bidens-transparency-claims-have-lost-credibility/