This is why I wrote this guide:
https://www.ajtek.ca/blog/why-kb-xxxxxxx-isnt-showing-up-in-wsus/
If you look at the KB, it says
The update is named Windows 11, version 23H2.
The enablement package is part and parcel with the unified update platform
https://www.ajtek.ca/guides/how-to-prepare-for-on-prem-wsus-uup-updates/
The update is actually slightly different as it looks like they are finally superseding updates for upgrades. Windows 11, version 23H2 x64 2023-12B
This signifies December 2023 B release patches it will upgrade to. A single upgrade from prior version of Windows to latest version of windows INCLUDING the monthly cumulative update (1 restart, not multiple).