I don’t think there will be a Bitem swearing in. If there is, I would assume he would be arrested immediately afterwards as any such swearing in would be treason.
Up through Jan 20, I think it’s possible that interesting things might happen.
The swearing in could be a Go Signal of sorts. But afterwards? Let’s say: Jan 21?
Once the full power of the US government, including the military, is in the hands of Harris/Biden*, then I don’t see how this turns around.
There is no legal mechanism for that happening. None.