So, at a certain point, Biden will have to present himself to the military as the rightful winner of the presidential election. I do not know the exact procedure, but this must be part of it. Either the military accepts him as the rightful owner, or they do not. It is like showing up at the lottery office with a fraudulent ticket and claiming you are the winner.
If Trump's EO's and other orders are effective, then the military will know what to do.
If not, then we are screwed.