Andres Betts has done a fantastic job of a tonne of doing an initial mockup of the new KCMs.
The mockups are available here: https://phabricator.kde.org/M112 This is going to be a combination of UI redesign, code cleanup and QtQuick porting. We have a workboard to track them all redesigns/porting here: https://phabricator.kde.org/project/view/254/ If you want to work on a KCM, we should split into a new pholio review for that KCM, discuss details, and add a link (edit related objects) in the pholio to the task in the workboard. Llike here: https://phabricator.kde.org/M111 Please ignore the new sidebar for now. It's a good opportunity for anyone to get involved, just assign the task to yourself. I think most of these need a bit of back and forth before even starting coding. Possibly even working mockups. I want to see things done properly per KCM so that they last the next 15 years; Any new KCM should have working i18n, a10y, RTL, keybaord nav and be super super tested, before merging. As 5.12 is LTS, lets not treat the workboard as a race, there is a branch in plasma-desktop called KcmQmlPorts that is worth making use of.