I'm pretty sure the politicians, law enforcement agencies, and judges with the power to incarcerate him are hoping he just does the world a favor and dies first. Nobody wants to go down in history as the first person to incarcerate a former president.
Oh, but they are. Should they be? Hell no. But they are. A sitting president cannot be charged with any crimes. Of course trumpy boi isn't a sitting president anymore, but they act like ex-presidents are completely sacred, regardless of how horribly they fucked the American people.
Edit: I think it's mostly that those with the power to do something about it don't want to set the precedent that they too can be held accountable for their actions. Once those floodgates are open, there's no closing them again.