Hi - this actually got some major refactoring work thanks to @akselmo - described here, with a link to the merge request if you’re curious! Desktop icons are surprisingly hard!
This should be landing in Plasma 6.3, which is currently scheduled to be released by KDE in February: Schedules/Plasma 6 - KDE Community Wiki
(Note that your device receiving that update depends on your Linux distribution, so the Kubuntu team would be the best folks to ask about the version of Kubuntu in which they expect Plasma 6.3 to land)