css – How to sync the style in the visual editor with the style of a child theme?

I have a wordpress site with twenty-twenty theme sightly modified with a child theme.
The site’s publically accessible surface is displayed correctly according to the modifications declared in the child theme. ( For example, the background is set to blue instead of the default pink-ish twenty-twenty color. )

My problem is that the visual editor still displays the content with the original template’s style, like there was no child theme at all. ) For example the main background in the visual editor is still that default pink-ish color, not blue.

I wonder if there is a clean and easy solution to copy, mirror, sync the style from the child theme into the visual editor… without messing with the css of the visual editor itself.