Thank you @bnjmnm, for your response.
In the Stable theme, we're using space ...

Thank you @bnjmnm, for your response.

In the Stable theme, we're using space for indentation in core/themes/stable9/templates/admin/indentation.html.twig. We have different behaviors within the core themes. Can we make them similar for both? We can make changes to Claro or Stable.

Stable:
<div class="js-indentation indentation">&nbsp;</div>