Dear Rana,
If you would like to remove the “Shop” from the breadcrumbs, please add the following code to your child-theme/functions.php:
add_filter( 'etheme_breadcrumbs_shop_step', '__return_false');
https://www.8theme.com/taskboard/ – what do you see on this page?
Point is that your request about gtin should be checked by our dev team, for this we would recommend you to post the request on Taskboard.
If GTIN values are not entered, they will not be used.
Kind Regards,
8theme team