Customization of is achieved through Android’s resourcing system. This means that all resources of the library can be overridden by providing resources with the same name in the application.
Material components are used so for in the ReviewFragment, so those components will pick attributes of the hosting activity if it uses a Material Theme.
Some attributes are set inside the library (styles that start with Root.) to provide the basic UI, but you can hook into the other styles to customize the screen further.