You'd have to give me actual literal quotes of democrats and board members saying that the right to vote was being taken away for me to believe it. I believe that claims have been made that the voting rights of some have been infringed upon, or are in jeopardy, are being attacked and so on, but I am skeptical of that claim being made by people because that claim isn't true.
Thankfully, thus far in Georgia, voter registration and turnout have swelled despite efforts to suppress it (attaching a correlation to the two ie 'voter surpression is proven by less votes or proven fake by more votes' is irresponsible without rigorous study controlling for multiple variables). I'm no expert and can offer no specific insight into the inner workings and framework of who is responsible for what/where/how in terms of polling places, but I do know that the state has several hundred fewer polling places now than it did before the Voting Rights Act got gutted. Some counties have had have had 80+% of their sites closed and some (I think 7) have one single polling site for hundreds of square miles. I also know that since the Georgia bill went into effect, the Atlanta metro area's number of ballot drop off boxes has dropped from over 100 to 25 or so.
Again, to answer your question very clearly of "Who doesn’t have the right to vote that used to have the right to vote?", the answer is either nobody or a very very small number of people. But that's not what people are talking about and you know that.
Voter suppression isn't denying people a right that they used to have, because the bad actors with bad intentions aren't stupid enough to spell it out that way. Instead, it's coming up with barriers, impediments, annoyances, and confusion that follow the letter of the law but have a clear yet unspoken spirit behind them. It's making election workers have to deal with hundreds of hours of "voter challenges" issued by other voters (A 2022 challenge to 37,000 voters in Gwinnett County forced 5 to 10 election staffers to work “all day, every day, six days a week” for multiple weeks and did not turn up a single ineligible voter). It's making college students have to drive two hours back home to vote in person because they're confused and don't want challenges by trying to do mail-in. It's making some folks have to stand in line for six hours. It's making other folks have to go to a hearing to prove their eligibility when they realize their registration is in jeopardy because of a clerical error that someone has challenged.
The correct technical answer to "Who doesn’t have the right to vote that used to have the right to vote?" now is the same correct technical answer to the same question in the Jim Crowe days. More interesting questions to me are who has a more difficult time being able to exercise their right to vote now than they did before, who's making that more difficult, and why?