Ungroup items on the Taskbar in Windows 11

The right key is:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell\Update\Packages
New DWORD value UndockingDisabled set to 1
+ restart explorer
As described here: https://winaero.com/how-to-restore-classic-start-menu-in-windows-11-and-get-back-live-tiles/

Edit: But it is unusable [by me, maybe somewhere it works OK]. After enabling that property, the Start menu doesn't work (it is not showed anymore) and explorer starting very slow. If I set UndockingDisabled back to 0, Start menu works again (but with icon grouping).