Maybe it the state legislatures had asked him to do that he might have been able to, though even that is very questionable. But none of the state legislatures did.
RINOS were part of the fix.
According to Steve Bannon’s War Room, the President of the Pennsylvania Senate wanted to review the Pennsylvania election results before Biden was installed in January, 2021.
That’s what I was thinking. In these disputed states, the state GOP’s offered alternate slates of electors, but the GOP-led legislatures were too cowardly to exercise their actual Constitutional right to offer official electoral slates. So even if Pence let his testicles drop and offered to sent the mess back to these states, he might have still been on shaky ground.