如何设置/分配我自己的ID到我在WooCommerce中使用PHP插入的产品？

I know that when I:

wp_insert_post

for each product, each entry get its own ID in database by default. But the case is that I want to assign my OWN IDs in order to be able to check product stock availability to a local database that uses those same IDs.

Any ideas?

I would suggest not use custom ID because it might hamper the internal functioning of wordpress.

You can use add_post_meta() and get_post_meta()

to store your custom Ids.