Hi there,
For the most part, the comma (,) is the delimiter. To change this:
* Go to WooCommerce > Products.
* Select Import at the top. You will see the Upload CSV File screen.

Link to image: https://snipboard.io/ADnNRq.jpg
It includes an option to select your CSV delimiter.
Let us know if there are any questions.
Thank you for your answer. Yes I know that. However, I want the default value to always be semicolon (;). Is there a hook for this?
Also in which php file is this being edited.
Thank you again.
2-) I didn’t want to open a topic again. I would be glad if you help.
Is there a hook that works during the product transfer phase?
I don’t want to write data like attribute visibility and attribute global for variations as 1 at a time. I want to get it as 1 by default. That’s why I asked.
That’s a good question,
This is possible using this filter:
woocommerce_product_export_delimiter
If you are not familiar with hooks, you can start at:
https://woocommerce.com/document/introduction-to-hooks-actions-and-filters/
* Also, you can find more information at:
Delimiter property with filter:
https://github.com/woocommerce/woocommerce/pull/24759
* To alter the default delimiter, you will need a custom snippet
You can find the snippet here.
I hope this helps.