When you add a reg file, it can be applied on several screens.
1.
Registry screen integrates your reg file into the offline image. HKLM keys get added to the Windows system hives. HKCU keys get added to Default User's NTUSER.DAT.
The consistent problem for modern W10/11 is HKCU keys added here don't get inherited by new user profiles. This appears to be some provisioning detail that's not well documented. Your keys are likely clobbered.
2. Reg files can be imported in Post-Setup
(Before logon). This works for HKLM, but fails for HKCU because "Current User" isn't you but the SYSTEM identity. There's no point importing HKCU keys here.
3. Reg files can be imported in Post-Setup
(After logon). This works for both HKLM, and HKCU. But notice we're after logon, so newly changed keys don't always have impact on the current session. For example, you may have to kill/restart Explorer or the Desktop. Or logout/logon.
After your Start Menu is pinned, changing your CDM's preferences won't unpin the existing app icons. You will need to experiment to find out which combination works best.
If you want to block the W10 to 11 migration attempts or reminders, apply this reg file on every PC:
Code:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate]
"ProductVersion"="Windows 10"
"TargetReleaseVersion"=dword:00000001
"TargetReleaseVersionInfo"="22H2"