The double/middle click options affect all monitors in Windows 10, too. Perhaps you didn't lock your secondary taskbar, which could make the double click not have the selected effect, but that's more of a limitation than a feature. You can try doing that on Windows 11 too if you prefer.

Edit: I checked, and on Windows 10 both monitors handle double click even if they're unlocked. So I'm not sure why you saw a different behavior on your Windows 10.

Are you using disable_taskbar_transparency? If not, then I don't think the problem you're seeing is related to 7+ Taskbar Tweaker.

Не с помощью 7+ Taskbar Tweaker. См. так же:

https://tweaker.userecho.com/topics/32-custom-date-format

Как альтернатива, можете попробовать мою другую программу, Windhawk, у которой есть мод на эту тему:

https://windhawk.net/mods/taskbar-clock-customization

Закрываю как дубликат.

For now, there's no such option, but you can configure a mouse shortcut for that using the advanced options. For example, you can configure such that Ctrl+click minimizes combined items. Refer to the help file for more details ("Minimize all group items" under "Mouse Button Control"). Let me know if you need help configuring it.

Sorry, but it's unrelated to the taskbar and is out of scope.

It's a limitation I'm familiar with. Haven't had the chance to look at it yet.

In this case, I'm closing this as a duplicate to the topic I mentioned above.

So, are you using the "Combine when taskbar is full" configuration? Because if you are, it's just not supported and I can close this topic.

I assume you're using the "Remove extra gap between items" option, which makes pinned items take less space. You can turn this option off, which will revert to the default system behavior and make the pinned items take the same amount of space as running programs.