I don't know what you hope to achieve with your "conspiracy theory" that the vote was fixed in any way. If anything, it was the Republicans who were more interested in getting a fix in months before the election took place, with Dipshit Donny constantly (and erroneously) stating that postal voting was open to manipulation. Then he appointed that strange chubby fella as Postmaster General (with no experience whatsoever), who immediately proceeded to dismantle automatic sorting machines, remove thousands of postboxes from the streets, ban overtime deliveries etc.Maybe the ballot harvesting was so focused on the presidential race, somebody forgot to make sure that those ballots were filled out in its entirity, before election day because the voter was barely involved. Or the post election ballot fixing process, was time consuming and not all the partially filled out ballots could be fixed...... In any operation; the cockup theory will always be prevelent.
Look at Rhodesia, where the ballot boxes were been stuffed by the Smith/Muzorewa people, whilst Mugabe was ballot harvesting on an industrial scale and both sides were cheating and the better cheater won the election.
I was delegated as an election observer in a local and national election in Nottingham in (I think) 2016. The scrutiny exercised by all observers was absolutely insane! There was no way anyone counting the votes could get away with anything even remotely dodgy. And I imagine the same level of scrutiny was apparent in the US elections. I just don't see how you can still maintain that it was all a fix for Biden, unless you're jumping on the same bandwagon as your wan Powell there with undue influence coming from Cuba, Venezuela and, possibly, China using a method introduced by Hugo Chavez (who died in 2013). However, I'm sure the truth will out in the end.