Same here, 23H2 installation first showed having an error.
However this message quickly disappeared and now it shows as "successfully installed 16/11/2023" in Update History.
There is no such option to enable it under Taskbar Settings / Taskbar items.
I tried to uninstall the the latest Windows update via boot repair, but it does yield an error immediately too.
It looks to me, like it Windows thinks the update was done and reports no issues, but I can not see any signs of the mentioned changes or features on my system.
I tried to use Update repair tool, it said it found a problem and did changes and I shall try again, but it doesn't change anything.
The update is still listed as successful.
Searching for updates tells all is up to date.
I'm a bit out of clue.