Windows 11 includes some pretty big visual changes, but the changes to the taskbar are more than just skin deep. Microsoft has removed many taskbar options. Love it or hate it, the taskbar in Windows 11 is stuck on the bottom.
People first noticed this in the leaked build of Windows 11, but that was not a final version, so it was reasonable to believe it was just unfinished. However, it was also an unusual thing to be missing considering that Windows 11 is clearly built from Windows 10.