They've "brought awareness" to the problem. You'll never find much in the way of actual specifics or policies or changes, since progress in those areas was always being done by smaller, more focused orgs that didn't spend all of their time and money buying political favors and media coverage. I can think of maybe bodycams that got pushed through by the early protests, though now they've done a 180 on that.
Beyond that, very little more than "awareness." Of course, one might also reasonably point out that this awareness seems to be backfiring kindof hard. So it is that a targeted radicalization of the youth has succeeded -- only it turns out American millennials and zoomers are of worse stock than the Chinese red guard, and not really so helpful when they face any swath of resistance. Politically, the Floyd moment seemed to garner nearly universal sympathy that was completely unrelated to BLM... and BLM essentially turned off a lot of potentially erstwhile allies with its antics.
Of course, this is haram to speak publicly, and so people point to the fact that no-one is speaking publicly against it as proof positive that it must be a force for good.