flatsome_on_sale_product_custom_text.php

<?php
//flatsome on_sale product custom text

function display_text_product_box_after() {
   global $product;
    
          if ( $product->is_on_sale() )
          {
             echo '<b style="color:red">Limited time offer</b>';
          }
   
    }
    
    add_action('flatsome_product_box_after', 'display_text_product_box_after');