I’ve noticed (mainly in QML based settings dialogs) buttons that provide additional information.

System Settings

Haruna
They appear to be implemented per application and not as part of the KDE Framework. The implementations are different in each case, Systems Settings’ usage shows a popup when hovering and Haruna’s is a click to display a popup and also uses a red icon for a warning type messages. As can be seen below, the look of the popups are different.
I would like to suggest a new widget/kirigami addon something like KInfoButton to centralize the implementation and provide a consistent look and feel.

