In Drupal layout builder I may have a section with several drag and drop regions. Each region can contain multiple components (fields for example). I would like to add a style to the region – not the section or the component. EG. In the below picture I would like the editor to be able to add a red border to the drag and drop region containing Field 5 and Field 6.
I have looked at the Layout Styles module and it only seems to cover sections and components. Is there a solution in core (possibly an active patch) or contrib to allow the editor to control region styles?