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Hello @caramella1123,
Thank you for contacting Rank Math support.
The code extends the Product Schema of our plugin, so it will only work for the sites where you are using our plugin’s Product Schema. For the other site, you should get in touch with the support of the plugin you are using to add the Product Schema, as they will be able to help you extend it and add additional details.
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.