No Option list

As describe in the project page, this module do not provide any default plugin configuration:

Style Options is a developer module and does not provide an admin interface. Once the module is installed, developers can create configuration files in modules or themes, named [module name].style_options.yml or [theme name].style_options.yml, in the root folder of either a module or theme, respectively. See examlpe.style_options.yml for an overview of possible configuration.

You have to define your own XXX.style_option.yml file in a custom module or theme on your project.