Biden didn't order the DOJ to investigate further because he, unlike Trump, didn't see the DOJ as his personal law enforcement agency. And because if he'd even suggested that a look be taken at Trump, Trump's base would have become hysterical.
But things are different now, and many members of that base feel different. To make matters worse, Donnie himself can't seem to shut up about Epstein and Maxwell's adventures, and his long friendships with both. That is strange, but if we're lucky, he'll confess.
And then he won't get his Qatari plane OR his tacky ballroom.