NOTE: I'm not Dooming here. There will be justice. PAIN IS COMING.
Think about it. If a shoplifter is found filling his pockets in the store, security doesnt do anything until he steps outside the store. Only then can he be arrested. We've been told to be peaceful for a reason. We are fantasizing about a mass arrest at the 11th hour. This may not be part of the plan - just a heads up - this is bigger than any of have been counting on. Be prepared to let the enemy completely destroy themselves by allowing the coup to be completed.
I think the plan is to arrest him as he is being sworn in. There really is no strategic advantage to letting him become POTUS and then arresting afterwards, the optics would look like a military coup dethroning a sitting president albeit a illegitimate one.