Hi,

The SEO Toolkit extension already had the ability to add structured data to product pages.

Admin: System > Configuration > SEO Rich Data > Product Rich Data

It would be great if this could also include shipping data, which Google now prefer to have included: https://developers.google.com/search/docs/appearance/structured-data/product#product-with-shipping-example

Ideally, taking the information from the shipping rates setup, or adding configuration to specify what should be shown.