Blog category page | WordPress.org

Hi, how can I customize blog category pages (archive page ?) on storefront ? Maybe missed something but this is not a page available on the backoffice so no idea of where and how I can customize it.

Ideally would like to have the same presentation than the root blog page which is using extra grid block of a plugin based on the template fullwidth which comes without widgets. But really no idea of how achieve that on storefront. Any help super welcome.

Regards

The page I need help with: [log in to see the link]