WDAG for the new Chromium based Edge does not work when the value "CWDIllegalInDllSearch" in
"HKLM\SYSTEM\CurrentControlSet\Control\Session Manager" is set to "dword:ffffffff".
This is a defense in depth setting described in "A new CWDIllegalInDllSearch registry entry is available to control the DLL search path algorithm" (KB2264107).
When this entry exists (reboot required), the menu entry "New Application Guard Window" does not show and only the old Edge WDAG works.