GTIN : Unable to retrieve those for variable products

Hello,

I’m writing to you because I can’t find the GTIN for my variable products. I’m using the field created by SEOPress. But in the variables, I can only find the GTIN meta_key for simple products and not for variable products. Variable products have a different meta_key.

I’ve already asked SEOPress support but they said to contact Adtribes.

If anyone could help me that would be great! Maybe there is custom code to register your own variables?