I recently installed Linux mint ane was unpleasantly surprised that it is virtually impossible on every desktop environment, as opposed to Ubuntu on which it required very little.
The GNOME dash-to-dock extension has options for how the dock should display on multiple screens, if that’s what you mean.
You just add a panel to every screen as it doesn’t do it automatically, but if you want a taskbar where the open apps are visible from different monitors on the panel then you could try using kubuntu backports for kde 5 on mint, go with the minimal install. You still need to manually add the panel to extra monitors, but they are linked together.
Can I set it to show open windows and pinned windows in exactly the same order on all screens?
What you want is KDE
No it’s not. I use plasma and it’s amazing but the panels are not the same, each panel is different and can’t be synced.
KDE can display one taskbar on all displays? If so I would like to know how
Not technically, but you can configure both task bars to display the same things
If so, then it’s the same in XFCE.
It’s not, Xfce can only have one systray
Second for KDE. Add a default panel to a screen and boom! You got what you want. Additionally, the DE is endlessly customizable.
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