That is incorrect. You may have overlooked the word "solely".
With regard to the provision you cite: "The President of the Senate shall have no power to solely determine, accept, reject, or otherwise adjudicate or resolve disputes..."(etc.)
What you do not mention is that Pence had the authority to recognize correct and formal written objections from members of congress that addressed the votes of electors. It is my understanding he held such objections.
There was on Jan6 substantial credible evidence of election corruption. Pense, as a the second highest leader of the R party should have made an effort to see the R members of Congress had an opportunity to confront the various states with that evidence. That, after all, is what the Session is about. It appears, however, that he sat on his hands.
And, coincidentally, it was probably why Pelosi appears to have been anxious to see chaos.
https://freerepublic.com/focus/f-news/4133096/posts#3
The “election” alleged to be fraudulent has no Constitutional existence. The 50 State Legislatures which appoint 535 Electors (and Congress, which appoints 3) have all adopted the custom of having people voting as the means by which the appointments are normally made, but this creates 51 elections, not one.
Those 51 elections occur at the direction of, and are subservient to, 50 legislatures and Congress. The States unwisely granted Congress 3 Electors by ratifying the XXIII Amendment in 1960, so Congress does have supervisory power OVER THOSE THREE, but not otherwise.
There is only one Presidential election in the Constitution, it takes place in December, there are 538 voters, and in December 2020 Biden got 306 of them and was elected President.
No State Legislature objected that its Electors were not the ones they had appointed. No State Legislature even convened to consider the matter. In the case of Pennsylvania, the Legislature fled to avoid considering the matter.
It has never been alleged that a single one of the 306 votes for Biden/Harris was a forgery, that the Electors who casted them were impersonating someone else, or that the Legislatures had secretly appointed other Electors.
There is zero space for an allegation of fraud in the Constitutional Presidential election of December 14, 2020.
As far as the 51 elections which occurred on November 3, 2020, they may very well have been rife with fraud, but since the appointment power of the 50 State Legislatures (535) and Congress (3) is plenary, that’s a problem for those legislatures to deal with should they choose to do so.