I see that there is a standard definition for EAN codes under metafields.
I have added the EAN metafield to Variants and I can fill them there.
For what use case did Shopify create it? On the .dev site it states for standardization in themes.
It would be nice if you can select the EAN Variant metafield as a dynamic source without additional code everytime a customer selects a different product variant.
And does Google do anything with this metafield? Can it access it? Via the Google App or their webcrawler?
I noticed that with the products/variants where I also filled the EAN metafield besides the Barcode field, that Google likes that more. I don't get a 'add GTIN' comment at those products in the Google App inside Shopify.
Let's hope it stays that way.