I think we can trust the Republican Secretary of State(now governor) of Georgia when he said there were no more votes to find. He wanted Trump to win. Why would he lie? He'd have nothing to gain by stopping the sitting Republican president from carrying Georgia- it was still clear that there was no chance that the outcome could be reversed in Georgia in any case, as you yourself pointed out- it's still silly to imply that changing the outcome in Georgia would cause the outcomes in the other three swing states- all of which Biden had won by a larger margin than Georgia- to flip. Michigan had gone to Biden by over 154,000 votes, Pennsylvania by 80,000, Wisconsin by over 20,000, Nevada by 32,000, Arizona by 11,000.

And Georgia had had repeated recounts before Trump's call- none had changed the results in any significant way.

Face reality- there was NEVER a scenario in which all the swing states would have switched to Trump wins in the popular vote- he would have to have come from behind in all of them to have won- and nothing that ever justified the Republican demand to throw out the popular vote results in all those states and let swing state legislatures- all of which had gerrymandered Republican majorities- hand those states' electors to Trump.

There was no "steal"- Trump simply lost- it's not an injustice to lose when your campaign's polls predict you'll win- it happened to Hillary in 2016, to Kerry in 2004, and to Thomas Dewey in 1948, to name just a few- and it's over. Move on.