Let me walk you of what we wanted to achieve. So, we have Sellers that have multiple retail brands on them. For example, Seller Rue Madame has Retail brands like: Veja, HOBBS, Sweaty Betty, JONAK, and many more. Can we set up a metafield, that whenever there is a product pulled it would automatically have the Brand Name in them and the tag “Brand:brand name” for example, “Brand:Veja”
How do you intend to use this data?
And also I don’t think that’s possible in my knowledge to automatically get a metafield to have some value, you will have to add the value to individual products.