Actually the FBI didn't violate the order. Mark Meadows modified it.
Meadows and Trump planned to hand over an FBI file to a conservative journalist
They reportedly rushed to get a set of redactions on the file, and Trump declassified it
The plan was scrapped because DOJ officials warned releasing the file could break privacy laws,
In the final days of his presidency, then-President Donald Trump approved Mark Meadows's plan to get a set of redactions approved on a file of FBI information so that it could be declassified and handed over to a sympathetic journalist,