Index: src/wp-admin/includes/file.php
===================================================================
--- src/wp-admin/includes/file.php	(revision 45060)
+++ src/wp-admin/includes/file.php	(working copy)
@@ -2148,7 +2148,29 @@
 
 	$group_html .= '</div>';
 
-	return $group_html;
+	/**
+	 * Filters the single group HTML for the personal data export report.
+	 *
+	 * @since 5.3.0
+	 *
+	 * @param string $group_html The returned HTML for this group and its items.
+	 * @param array $group_data {
+	 *     The group data to render.
+	 *
+	 *     @type string $group_label  The user-facing heading for the group, e.g. 'Comments'.
+	 *     @type array  $items        {
+	 *         An array of group items.
+	 *
+	 *         @type array  $group_item_data  {
+	 *             An array of name-value pairs for the item.
+	 *
+	 *             @type string $name   The user-facing name of an item name-value pair, e.g. 'IP Address'.
+	 *             @type string $value  The user-facing value of an item data pair, e.g. '50.60.70.0'.
+	 *         }
+	 *     }
+	 * }
+	 */
+	return apply_filters( 'wp_privacy_personal_data_export_group_html', $group_html, $group_data );
 }
 
 /**