We cannot help you with these error, you must provide GTIN or MPN for those products.
You can add a combination of ProductID & VariantID for MPN.
Also, you can find more details at https://help.shopify.com/en/manual/promoting-marketing/create-marketing/google/syncing-products#unique-product-identifiers
GTIN or MPN errors Print
Created by: Customer Support
Modified on: Thu, 15 Jul, 2021 at 8:55 AM
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