Al Gore is an @sshole, but no certification was ever delayed in that election. The Electoral College convened on schedule in December 2000 and certified the electoral votes, and a joint session of Congress convened in January 2001 as required by law — with Al Gore presiding as VP, as required by law — to formally count and validate the electoral votes.
So what?
The Supreme Court had already ruled against Gore. No such ruling ever occurred - either for or against Trump in 2020.
Also, no one had a problem with Pence presiding. What he did though that was illegal was to accept fraudulent electors while legal challenges were pending.
So why? Why did Pence stab Trump in the back? Because he wanted to. He had a legal constitutional right to defer and let Leahy conduct the Kangaroo Court, but No.... He WANTED to disregard the law and betray Trump and the American public.
You can spin this all you want to in your lame attempts to say Pence had no choice but to follow the Constitution, but that is just not the case.