Since Harris was still a California Senator, shouldn’t she have remained at the Capital to participate in the Electoral College certification beginning at 1:00 PM? Instead, she decided to go to the DNC to call donors? Hmmm... it’s almost as if she knew something was going to occur to delay the certification.
Upon taking the Oath of (higher federal) Office her California Senate seat became unfilled. A Vice President is also responsible for breaking tie votes - which wouldn’t be possible if she held both positions simultaneously.
I could be wrong.
You are on target. She knew. A correct timeline of all her movements on J6 might be very telling.