Sadly, there are some who will believe that it is "still" possible to prove Trump won. I think that ship has long since sailed. I believe that's why Trump's cases were tossed since it was only allegations of impropriety and no proof. States made changes as a result of the pandemic. I don't think it made a difference on who voted or how their votes were cast. High voter turnout could just as easily been a response to the pandemic as ppl were not busy living their normal lives; so more of them voted generally.
The next 16 months will certainly be interesting if any defense comes up that is anchored in facts besides summary conclusions and hypothesis.