I can say I solved this for myself.. from start if November until December the update was there waiting, but I had important stuff for a course I was taking. So I waited until Christmas break
But the update was gone for some reason.
None of the suggestions in this thread worked, I got my solution from the Lenovo forums
The solution for me was as followed
- type Local Group Policy in the search bar and it should give the option to edit group policy
- open that
- expand and navigate to
Computer Configuration > Admin Templates > Windows Components > Windows Update > Manage updates offered from Windows Update > Select the target feature update version
- once you get to this menu, check enabled
- in the blank boxes put Windows 11 in the first and 23H2 in the second
- click apply and ok
- run Windows Update and it should now show
- (after you get your update you can put that toggle back to not configured and future updates will show normally.... If you forget to put it back, when 24H2 or something comes out you won't ever see it)