How to edit/translate "All posts" page title.
Page title "All Posts" can be changed either in language file in theme_name/languages folder using Poedit software or directly in wp-content/themes/theme_name/fw/core/type.post.php file (support.post.php), line 359. Please search for the text in the document in case the text is not found on this line.
$title = esc_html__( 'All Posts', 'theme_name' );