Not only have the states never amended the Constitution to expressly prohibit themselves from prohibiting otherwise qualified voters who cannot present a valid voter ID from voting, but also consider the following.
The U.S. 5th Circuit Court of Appeals' action is wrongly a preemptive strike against the states imo, possibly activist judges using the 15th Amendment (15A) as an excuse to justify their action.
In fact, since the states gave Congress the specific power to legislatively strengthen 15A as evidenced by the language of that amendment, it’s up to the 5th Circuit Court to reasonably show that the states have broken federal laws that are reasonably based on that amendment imo.
We might find out after the election is over, not before, their job will have been done.