Ask yourself a simple question: if it's not a voter suppression law, why does it criminalize handing out water to people in voting lines, no matter who's handing it out? The law is so broadly worded that you could be arrested simply for giving a bottle to a family member.
There are a number of other anti-democratic measures that I'll touch on in a moment, but that anti-water component speaks volumes about the true goals. It's not about protecting election integrity; it's about making it difficult for Democrats to do the things that help them win, such as queuing up in long lines due to a lack of polling stations.
While it guarantees vote dropboxes, it also limits the number and availability of dropboxes to make it harder to vote. It shortens not just the duration of runoff campaigns, but the period for runoff voting (gee, I wonder why they want to limit that?). It shrinks the window for absentee voting and imposes stricter requirements for those votes. It even strips some of the powers of the Secretary of State in a not-so-subtle attempt to punish Brad Raffensperger for upholding the true outcome of the 2020 election.
There are a few token nods toward actual integrity in the law, but the brunt of its measures are meant to disenfranchise voters.