sku field does not appear in product variants,

i solved this by add individual SKU to main product – when you check advanced settings there is place for SKU (despite its variable product).

Hi @mertozsoy

If the above suggestion doesn’t resolve the issue, you’ll next want to run a conflict test to determine if the issue is coming from a plugin/theme conflict. Here’s how to do a conflict test:?https://docs.woocommerce.com/document/how-to-test-for-conflicts/

Thank you