From another thread. Worked for me.
on the registry go to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Windowsupdate (Create a new key Windowsupdate if it does not exist)
On Windowsupdate
create new string value with a name ProductVersion, set the value to Windows 11
create another string value with the name TargetReleaseVersionInfo, set the value to 24H2.
create a DWORD with a name TargetReleaseVersion set the value to 1.
After all that go to ahead and check for the update it should work. I deleted all of this after the receiving the update just to be safe.