We’ve known that for a while now, but your analysis conspicuously excludes the scenario of multiple states sending multiple slates of electors for some reason, such as 1876. The veracity and effectiveness of those dueling electors in 2020 is still not determined yet, either.
What was the certification process for electors in 1876?
At that time I don’t believe there was a popular vote in each State for the President.
Currently, each State has a certification process, and it is my understanding that Pence will count only those Electors who are State certified.
By “state” it is meant in the legislation the governor and the state legislator send competing slates-—which has happened. This absolutely does not include “non-certified” slates.
If it did, you would have long ago seen third parties sending in “slates.”
Don't confuse a rump group of partisan legislators with "the state".