Some secrets are just too good not to share. I've written a short tutorial showing how to change the spacing of icons in the system area in the Plasma desktop environment by editing the QML plasmoid configuration files. Take a look. https://www.dedoimedo.com/computers/plasma-system-area-icon-spacing.html Cheers, Mrk
@Mrkvonic, when going through the features of Plasma 5.18, did you happen to check out the theme section of the System Settings? I'd be curious to know if they have improved the customizability there. Up until a year or two ago, right from the UI we used to be able to easily mix and match elements from different themes (for example, using the Oxygen clock within an overall Breeze look), whereas now we have to take a theme as a package deal, take it or leave it.