Change the title of the style options

I think the Behaviors details container is not proposed by the style_options module but is part of the paragraphs plugin behaviors.
You must also have activate layout_paragraphs module, which allow you to define and translate the title of the section Behaviors.

The 'Layout Options' details only shows options defined directly to apply to layout in your the XXX.style_options.yml files, and is managed by the layout core functionality.

Both layout and paragraphs behaviors cannot be handle together.