The simple option to open pinned items with double click to avoid accidental clicking was added to 7+ Taskbar Tweaker back in 2011. 7+ Taskbar Tweaker doesn’t support the new Windows 11 taskbar, but some of the functionality is ported as Windhawk mods. Shortly after Windhawk was released, I published the Windhawk mods for the Windows 11 taskbar post, where you can vote for features you’d like to see ported to Windows 11. Opening pinned items with double click was high on the list, and I’m happy to inform that it’s now available as a Windhawk mod.
Here’s the Windhawk mod that implements the option for Windows 11:
Open pinned items with double click