Hi @sertancayci,
Normally, the product data should have a dropdown to select the type of product you wish to create, like a variable product for instance.

Link to image: https://docs.woocommerce.com/wp-content/uploads/2021/05/WooCommerce-Product-data-meta-box.png
To troubleshoot what could be causing the issue on your site, let’s check a few things.
1. I see that you’re using WooCommerce version: 3.7.0. This is an outdated version, thus, could you kindly update to the latest WooCommerce version? Once you’ve updated, check if the issue persists.
* As you’re updating from a rather old WooCommerce version, I would recommend taking a full site backup before the update. You can use UpdraftPlus for backups.
2. If the issue persists after the above step, it is likely that there’s a plugin/theme conflict causing it. Thus, kindly do a full conflict test as explained in this guide – https://docs.woocommerce.com/document/how-to-test-for-conflicts/
If the issue still persists after the above two steps, could you please share a copy of your site’s System Status? You can find it via WooCommerce > Status. Select “Get system report” and then “Copy for support”. Once you’ve done that, paste it here in your response.
Let us know how it goes.
Thanks.
Hi,
We’ve not heard back from you in a while, so I’m marking this thread as resolved. Hopefully, the above info was helpful and you were able to find a solution to the issue.
If you have further questions, please feel free to open a new topic.
Thanks.
Hi,
Once the updated the woocommerce version, my problem resolved.
Thank you for your response.