The list items don't highlight on hover despite reacting to click, but the subtitles become more opaque on hover. It's a bit odd.
Ah it's a general issue in SwipeListItem, which is used by these KCMs. You can see it in the manual test in the Kirigami repo too.
Ok, so the problem here is that SwipeListItem is based on the QQC2 SwipeDelegate template and we recently removed the backgrounds in favor of inheriting backgrounds from the style, but we don't have styling for SwipeDelegate in qqc2-desktop-style. As a result, we're not inheriting any background.
Forward-duping to Bug 495291, which tracked the fix for this. *** This bug has been marked as a duplicate of bug 495291 ***