CIRCLE WITH A DOT

#OpenBSD Good morning all. I would like to confirm my understanding regarding snapshot updates, and don't feel this is a question for the mailing list. A few days ago I updated my OpenBSD laptop with 'sysupgrade -s'. This updated to the 7.9 snapshot, but the directory on the mirrors at /pub/OpenBSD/7.9 is not available yet. My assumption: everything needs to be build for the new 7.9 snapshot and will be there in a few days. Is this a correct understanding? If I try to install something now, I get ".../pub/OpenBSD/7.9/packages/amd64/: no such dir". I guess the other possibility is that it won't put up until the 7.9 release is done.
If I have missed something in the FAQ which should clarify this, I apologise for the noise.
Thanks to all the developers and committers who work on OpenBSD!