The Jan 6 was to stall for time and to put pressure on Pence/provide cover for the admin plan. It was a backup only in the sense that Pence wasn't on board. But it was aimed at helping encourage him to go along with the plan.I don't think so, I think the capitol attack was the backup plan if the administrative one didn't work.
There's some reports of grumblings that rump royally fucked it all up as the rally before the riot/invasion made it even more impossible for Pence and the senate to back the administrative coup.
Trump lawyer says coup plan would have worked if it wasn't for Pence
Eastman blamed Pence, "an establishment guy,' for not following through with his coup planwww.salon.com