there is a maintained and Qml ported fork on GitHub: https://github.com/Swordfish90/qmltermwidget
after I installed it, I now have a new issue of now 'icon' in systray, just a long text string. But, clicking 'text' does launch konsole. i'll work on it when i have a minute, having other issues with dup to Leap 15.5 from 15.4... it's Never easy... always issues.
fyi, i did a cursory check and it's Not installed in /usr/share/plasma/plasmoids/ so, i will have to 'find', again, when i get a minute.
couldn't let it go... it's in /usr/lib64/qt5/qml/QMLTermWidget/
turns out this fork does Not 'launch' a konsole window, but IS a terminal widget/plasmoid and the 'text' i was seeing in the taskbar was the 'terminal prompt'. this is Not useful to me. So i'm going with plasmoid konsole which lists konsole profiles and a click launches one. Sorry I couldn't be more help. Landis.