Backend Styles

Good morning,
I have defined an additional class for the theme. The columns with the class should get a thick blue border. This works very well.
Now I would like to show this blue frame also in the backend for the other users of the site. In the default WordPress themes there is the file editor-styles.css for this, which I can also create in the child theme.
In BAM, the backend is styled via editor-blocks.css. The file is located in >Assets>CSS in the parent theme. How can I create editor-blocks.css in my child theme so that the file is used by the backend?

Many greetings
WP-Dummie

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