Since template version 2.1.0 no additional page layouts are part of the distribution. Only one standard layout is installed. In folder fileadmin/_yaml-styles you can find additional page layouts and designs which can be added by importing them. I did not list the page layouts and designs here, because soon there will be added new ones constantly and therefore the list would never be up to date. All YAML-standard layouts which were installed in earlier versions can be viewed here and you can decide if you want to install them or not.