Yesterday I built autosig-u-boot-2023.04-5.el9iv in the automotive9 sig:
https://cbs.centos.org/koji/buildinfo?buildID=63936

It is tagged automotive9s-packages-main-release, but, it seems like the repo has not been regenerated, because the package is not listed in:

https://mirror.stream.centos.org/SIGs/9-stream/automotive/aarch64/packages-main/Packages/a/

I tried untagging and re-tagging it today, but that made no difference.