Do you think he's actively blocking it? Or is it possible on his list of thousands of things he's doing (220+ and counting) that he's waiting for the noms? If his admin (Bondi specifically) said on her first day in the office that it was a priority to release it, she would have the power to do so. And so did his FBI nom (Kash)- he will also have the power to do so, especially in coordination with DOJ. That leads me to believe he's doing the opposite of blocking it, he's nominated and placed people with the constitution to do it. Just my rose colored glasses, I'll admit.
I totally agree in self-preservation and blocking something that could hurt you politically, but that's not what the actions of the admin lead me to believe.