To date, the DOJ has prosecuted over 800 participants in this far-reaching coup. In keeping with how these cases are generally prosecuted, you start at the bottom and work your way up.
This is exactly what DOJ is doing. They scooped up many of the Capitol invaders and are looking for more. Then they moved on to the people that paved the way into the Capitol, the Oathkeepers and the Proud Boys. Now they’re focused on the layer above that: Peter Navarro, Roger Stone, Steve Bannon, Mike Flynn, John Eastman, Jeffrey Clark and others.
Once you get that layer lined up, you head to the next one: Mark Meadows, Ivanka Trump, Jared Kushner, Don Jr., et. al.
You work them all. You get their cooperative testimony. Or you don’t, so you pressure them with charges you can bring against them and make deals in exchange for their testimony.
Only then, after you’ve got all the testimony and documents that you can possibly obtain, do you go after the top dipshit. And there is absolutely no point in doing it any sooner. We are still learning more every day about the depth of this corrupt scheme. There is more to learn, and it is more damning still.
Why would Garland want to prosecute with anything less?
Do you actually believe that Merrick Garland, done out of a Supreme Court seat and a significant victim of the walking, talking, quivering mass of corruption that is Mitch McConnell, is somehow oblivious to the corruption that is the entire Trump presidency? I don’t.