More specifically, in the Sessions and Boyd letters, Huber was only tasked to advise on any needed resources.
There is no reason to think that he's doing anything else.
“in the Sessions and Boyd letters, Huber was only tasked to advise on any needed resources.”
These letters do not task Huber to do anything. They are letters to other people.
The actual taskings to Huber have not been publicly revealed.
There is no reason to assume that Huber’s tasks are strictly limited to those items publicly revealed in those letters. In fact, DOJ policy prohibits publicly discussing, or even confirming the existence of investigations that are underway.
Any actual investigations would have had to be omitted from those publicly released letters.
But if a US Attorney (like Huber) becomes aware of credible information of a crime, they would have a duty to pursue it. That responsibility is routinely discharged by referring the information to the US Attorney with the appropriate jurisdiction. The DOJ IG has the same duty to refer credible information of a crime, and to do so in a timely manner.