No he did not. He gave a "direction". Which, legally, means almost nothing.
> “Going forward, consistent with the President’s direction, this Department of Justice – in a change to its longstanding practice – will not seek compulsory legal process in leak investigations to obtain source information from members of the news media doing their jobs,” Anthony Coley, Justice Department spokesman, said in a statement.
They are changing a "practice".
One uses laws to prevent practices one does not like, not "directions".
Well, considering the DOJ is under his control, it’s not a “direction”, but a “law” of sorts. Actual laws come from Congress, which Biden doesn’t control.
Are you suggesting he's senile? Stupid? It's not clear why you'd think someone with Biden's political experience would be unaware that the President is the head of the executive branch.