Windows 11 Alt+Tab issue with Excel 2007 and 2010 — Excel windows always move to the end

Hi everyone,
We’ve run into a recurring issue on Windows 11 with Excel 2007 and Excel 2010. 
Whenever multiple Excel files are open, pressing Alt+Tab causes all Excel windows to move to the end of the Alt+Tab list.
This makes switching between Excel and other applications quite inconvenient.
This problem does not occur on Windows 10, only on Windows 11.

Possible Solutions Tried so far:
1. Disable Snap-related Alt+Tab behavior
Go to: Settings → System → Multitasking → Snap windows
Uncheck: “Show my snapped windows when I hover over taskbar apps, in Task View, and when I press Alt+Tab.”
Works fine for other apps, but Excel windows still shift to the bottom.
Reference: https://learn.microsoft.com/en-us/answers/questions/4118398/alt-tab-no-longer-switches-to-last-window-in-windo
2. Enable legacy Alt+Tab via registry
Create or edit this key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
AltTabSettings = 1 (DWORD)
Restores the classic Alt+Tab interface (like Windows 7/10).
Works, but uses the old-style UI.
3. Upgrade to Excel 2013 or later
The issue disappears completely.
Later Excel versions handle focus and task switching correctly. But due to license shortage we cannot upgrade to Excel 2013 or later.
4. Use ExplorerPatcher
Restores Windows 10-style Alt+Tab on Windows 11.
Works well, but being an independent open-source project, it introduces potential security concerns for managed corporate environments.
Reference: https://github.com/valinet/ExplorerPatcher

Summary:
This appears to be related to how Windows 11’s task switcher manages focus for legacy Excel window models (Excel 2007/2010).
Partial workarounds exist, but the most reliable long-term fixes are upgrading to newer Excel versions or using ExplorerPatcher.
However, in our corporate environment, we still have a large number of valid Excel 2007 and Excel 2010 licenses, and due to security and compliance restrictions, we cannot deploy third-party utilities like ExplorerPatcher.

Question:
Is there any Windows 11–specific fix or registry tweak that can correct this issue without reverting to the old Alt+Tab UI or relying on third-party tools?
We’re looking for a supported or policy-based configuration suitable for enterprise use.