자동 다크 테마를 선택한 다크 테마와 동일하게 설정하는 방법

Does tbe way the versatile banner changes the background work? You could install the component, add a background image for dark mode and try by using the preview.

Then you could use dark-light-choose which was for example explained in Update themes and plugins to support automatic dark mode - #5 by pmusaraj and is also used for the banner