1) "The total rejected ballots data is not yet available for 2020." from the fact check. So how can the fact check be used to disprove Trump's statements, or that it "Didn't happen".

More worrying, its been weeks since the election, and we still don't have definitive results. You don't find that suspicious? Most countries have final results on election night.

Okay, so if the total rejected ballot data isn't available what is your basis for claiming that it did happen? The burden of proof rests on the accuser. In any case we know that the signature rejection rates for Georgia in past elections were low.

What do you mean we don't have definitive results? Biden's win was certified by the states in the last week, in accordance with the law. It will only get more definitive when the electoral college votes next week. This is nothing new in the U.S., it's the way the process works.

These seem to be the most up to date numbers. "Rejected absentee/mail-in ballots as a percentage of total absentee/mail-in ballots returned, 2016-2020"

Georgia 2016 6.42%

Georgia 2020 .60%

Source https://ballotpedia.org/Election_results,_2020:_Analysis_of_...

Which cites the official Georgia election website as source of the raw data.

If you check the footnote there it seems Ballotpedia computed this rate themselves. It seems exceedingly unlikely this has anything to do with fraud, since other states handily won by Trump like Alaska and Iowa show similar large drops in 2020. I think fundamentally the data here is incomplete for 2020 and nothing meaningful can be said about it yet.