The coup wasn't January 6. The coup was the "alternate electors" business, and pressuring Pence to accept them as legitimate.

January 6 was part of it (some of the crowd were shouting "hang Mike Pence" for a reason"), but January 6 was just the last gasp of it.

People don't give Mike Pence nearly enough credit for, first, refusing to go along with the "alternate electors" nonsense, and second, for not leaving the Capitol when the Secret Service tried to get him out of there.