FabBlog is a free theme for WordPress created by sharkthemes.
FabBlog is a clean and masonry gutenberg ready child theme of Fabulist. Theme Demo http//demo.sharkthemes.com/fabblog/
(Description "FabBlog" Theme from wordpress.org)
You can download FabBlog for free via the provided download link and include it into your themes folder of your WordPress installation. Also you can directly search for it in the WordPress admin interface in the themes section and install and activate it from there.
More information, screenshots and reviews of FabBlog Theme can be found here.