add_action( 'woocommerce_thankyou', 'add_download_links_to_thank_you_page' );
function add_download_links_to_thank_you_page( $order_id ) {
$order = wc_get_order( $order_id );
$html = [];
if( $downloads = $order->get_downloadable_items() ) {
foreach( $downloads as $download ) {
$html[] = '' . __('Download') . ' "' . $download["file"]['name'] . '"';
}
}
if( ! empty($html) ){
echo implode('
', $html);
}
}