When Trump called the Georgia Republican governor in 2021 to “find 11.780 votes” for him, so he could be president, it was up to this one Republican's own ethics whether or not the democratic elections were overruled.
Of course the Republican leadership there has since been replaced with one loyal to Trump. Far more methods of voter suppression have since been implemented in all swing states. I'm sure another January 6th has been planned already, just in case all of this was not enough.
Did Democrats retaliate against this in any way? No... not really. Biden had some strong words against policies like these, but beyond that and blocking a few federal bills, there was nothing.