Subcategories Use Their Parent Category's Template
Makes subcategories use the parent category's custom template, such as category-news.php or a "category-news" block template, when they do not have their own.
Snippet Library
Archives snippets for WordPress
Snippets for category, tag, author and date archives: change titles and descriptions, the number of posts per page, ordering and which post types appear. For sites that rely on well-organized archive pages for readers and search engines.