Missing action item

In the last few Windows updates I've noticed that "Copilot in Windows (preview)" shows up at the rightmost edge of the taskbar.
That's fine, since I am experimenting with Copilot.
However, before the last few updates, I was able to click on an icon (a vertical bar) to display the desktop, this item has gone missing.
Is there a way to restore this icon, or is it not available anymore??l

Settings>personalization>taskbar>taskbar behavior>select far right corner of taskbar to show desktop

It was called Peek in Win10 but changed in Win11 where it minimizes open programs then restores. Look in Settings for this:

I never thought of that as an action item, but why not?