Add content to WooCommerce Additional Information Tab on Single Products

add-to-woocommerce-additional-info-tab-single-product.php

<?php
// This code should be added to the functions.php file of the child theme
// Add custom info to Additional Information product tab

add_filter( 'woocommerce_product_tabs', 'woo_rename_tabs', 98 );
function woo_rename_tabs( $tabs ) {
    global $product;
    $tabs['additional_information']['callback'] = 'custom_function_name'; // this is the function name which is included below
    return $tabs;
}

function custom_function_name(){
	echo 'New Content Here'; //add anything you want to show before the default tab content
	woocommerce_product_additional_information_tab(); // This function calls  wc_get_template( 'single-product/tabs/additional-information.php' );
	echo 'New Content Here'; //add anything you want to show after the default tab content
}
?>