I’m not aware. One full rebuild iteration takes normally roughly a week, and each of them fixes CVEs. We’re now supporting three separate branches for about a month or two, so a lag of three weeks is normal to happen, I’m afraid. Right now 22.11 has the lowest priority of the three AFAIK.
Even if security updates were shipping the next day via Hydra, not everyone has the same resources to build that many packages. Your work would additionally make it viable to apply for example bugfix patches to often used library packages that aren’t likely to land in either upstream or nixpkgs any time soon, without having to wait days for every single update to build. It’s sad to hear that that is the reason why you’ve stopped working on it and I hope you reconsider.