I want to create multiple simple-product with same SKU in WooCommerce. I search in admin settings but there I cannot find any settings to enable this features. Is there any hook so I can disable this features.
If you want to completely disable the SKU feature then you have to use wc_product_sku_enabled filter. It will remove the SKU field from both backend and frontend.
add_filter( 'wc_product_sku_enabled', '__return_false' );
If you want to keep the SKU feature but need to disable unique SKU check then you have to use wc_product_has_unique_sku filter. It will keep the SKU field in both backend and frontend, but will allow you to add multiple duplicate SKU.
add_filter( 'wc_product_has_unique_sku', '__return_false' );
Code goes in function.php file of your active child theme (or theme). Or also in any plugin php files.
Hope this helps!