the ability to either duplicate a panel or a better experience would be to save a panels config in its current state and give it a name. when you add another desktop panel it would show you the default current options(application menu bar, default panel, empty panel) and any that you have saved under the specified name you had given. you would be able to delete these as well. maybe with a simple "X" next to those user created panels in the context menu itself or in the system settings under an appropriate location.
*** Bug 433316 has been marked as a duplicate of this bug. ***
Also requested here, with references to discussions on various sites: https://forum.kde.org/viewtopic.php?f=83&t=168040
*** Bug 455878 has been marked as a duplicate of this bug. ***
*** Bug 382138 has been marked as a duplicate of this bug. ***
*** Bug 361787 has been marked as a duplicate of this bug. ***
https://github.com/KDE/latte-dock got this implemented.
*** Bug 461599 has been marked as a duplicate of this bug. ***
In progress with https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/4623
Git commit 5fa1c39fa494cc1e0d58160883ae3fb3e9f05ffc by Niccolò Venerandi. Committed on 05/12/2024 at 11:53. Pushed by niccolove into branch 'master'. Add option to clone panels Related: bug 446654 M +5 -0 shell/panelview.cpp M +3 -1 shell/panelview.h M +131 -0 shell/shellcorona.cpp M +2 -0 shell/shellcorona.h https://invent.kde.org/plasma/plasma-workspace/-/commit/5fa1c39fa494cc1e0d58160883ae3fb3e9f05ffc