We can also ad under action tab too

Thanks for the reply. Will shortcode work on PHP? I think we have to edit PHP file to put the button on order details page. Did you see the screenshots above?

We used this code or child theme to add a button on the order details page. The button looks OK but the button link is not working. It’s sending a message to the admin instead of the woo dokan buyer. Please suggest.

/* add shortcode on vendor order list action column */
function hifjul_shortcode_vendor_order_list_action_column() {
echo do_shortcode( ‘[fep_shortcode_message_to]‘ );
}
add_action( ‘woocommerce_admin_order_actions_end’, ‘hifjul_shortcode_vendor_order_list_action_column’ );