No it doesn’t. See Nixon.
He could have issued a blanket pardon for all parties that day.
But, he would have taken so much shit for it, he wouldn’t be able to run again.
The closer analogy would be Jimmy Carter’s blanket pardon of Vietnam war draft dodgers; however, even in that case, all members of the group were known at the time and they were pardoned for committing a single specific federal crime.
Most of the J6 protesters had not been identified and had committed no known crimes, but were later “creatively” charged and prosecuted for “crimes” that no protesters in the US had ever been charged with before.