I've been watching since the upgrade, the targets have all been posted, but overview.json and packages directory are still missing.
https://sysupgrade.openwrt.org/json/v1/releases/23.05.3/targets/ It's there
https://sysupgrade.openwrt.org/json/v1/releases/23.05.3/overview.json Missing
https://sysupgrade.openwrt.org/json/v1/releases/23.05.3/packages/ Missing
Perhaps @aparcar just needs to give the server a poke?
EDIT The symptom is that (at least) auc can't proceed:
$ auc -c
auc/0.3.2-1
Server: https://sysupgrade.openwrt.org
Running: 23.05.2 r23630-842932a63d on x86/64 (generic)
Available: 23.05.3 r23809-234f1a2efa
Requesting package lists...
No data available (61)