Hi @rogervanps,
If you have set shipping information for different countries in your WooCommerce store separately, you can ensure accurate shipping information by creating a separate feed for each country. Then, upload each feed to the merchant center individually. This will help in maintaining precise shipping rates for different regions.
For more details on how to set the shipping attribute to your feed, please refer to this documentation: How to include Shipping values into WooCommerce product feed (Google & Facebook)
If you require further assistance please let us know.
Best Regards,