Layout Builder Styles

Layout Builder Styles allows site builders to define styles that can be applied to sections & blocks placed via Layout Builder. Each style will apply user-defined CSS class attributes to the element wrapper.

When placing a block in a layout, this module will check if styles are available, and if so, present the user with a list of available styles. Similarly, layout styles can be applied when configuring a layout section.

Other features:

• Styles can be restricted to layouts or blocks.
• A site-wide configuration form sets whether single or multiple selections can be applied.
• A user interface is provided for managing the styles available. Since a style is a configuration entity, it can be exported and imported just like any other configuration data. 

This module requires Drupal 8.7.0+.