Canonical url facebook

Hi, i am using addtoany button in woocommerce product page.
I edited a bit woocommerce code in order to include the value of selected attribute in the product url (pa_attribute_name=value). So the product contain this information and if i share by mail, whatsapp or anything else i can see this information but, on facebook the shared url is without this information. I used dev tools from facebbok and i saw that the fetched url contains this informatiom but canonical link did not. How can include also this in the canonical url?
Thanks

https://wordpress.org/plugins/add-to-any/