Being appointed as Acting President would not be an election, so it wouldn't count towards his allotment of two. It would count as years, though, but would still fall within the allotment of 10.
However, I don't believe (though I've argued for it) that Congress or SCOTUS would accept a retroactive invocation of the 20th amendment, even if it took two years to discover and prove the fraud, meaning in hindsight that the President-Elect had failed to qualify and covered it up.
-PJ
There are "long shots" and there are "ain't never gonna happens". The idea that the Republicans in Congress would appoint Trump Speaker of the House even if they take control in 2023 falls into the latter category.
There are claims of massive fraud on one side and no fraud on the other. What happens next is key. Unless Cyber Ninjas or Lindell take their claims to court then nothing is going to happen, and indeed it's an indication that they don't have a lot of faith in their findings.