Hello There!
Hope you are doing good!
Our theme uses the below library to create breadcrumb for various pages like product page, blog page. Also, it creates google structure data to display breadcrumb on the google search result page.
https://github.com/justintadlock/breadcrumb-trail/blob/master/inc/breadcrumbs.php
You can find this file at ecommerce-gem-plus/assets/vendor/breadcrumbs/breadcrumbs.php
You may need to write this type of customization in the above file.
We do not recommend modifying vendor files because such changes will be overwritten by the next release of the theme.
Alternatively, you can redirect the shop page to products pages using the below plugin
https://wordpress.org/plugins/redirection/ .
Hope this helps!
Have a great day ahead!
Regards,
Team ProDesigns