how to show wc field factory custom field in a post

Hi, Using WC Fields Factory you can add custom fields to “Product” not to “post”.

It will work only with Woocommerce product.

Yes but like you can use add to cart button of woocommerce to any page or post is there any way to do with this also

Hi, refer this answer, it might be helpful for your scenario.

Regards
Sark