Hi,
That's not that simple to do.
You'll have to do 3 things:
1. In the product / show.php view file, you need to add the display for each variant:
<div id="hikashop_product_shipping_<?php echo $variant_name; ?>" style="display:none;"><?php
echo $variant->shipping_time;
?></div>
2. In your product layout (probably product / show_default.php ), you want to add the main display:
<div id="hikashop_product_shipping_main"><?php
echo $this->element->shipping_time;
?></div>
3. In the product / show_block_characteristic.php you want to change the line:
var names = ['id','name','code','image','price','quantity','description','weight','url','width','length','height','contact','custom_info','files'];
in order to add your new div name, like this:
var names = ['id','name','code','image','price','quantity','description','weight','url','width','length','height','contact','custom_info','files','shipping'];
This will allow the javascript system of the characteristics to copy the HTML in the div of the currently selected variant, to the main div.