Hi @sabbas
The location rule is saved in the wp_postmeta table under the “rule” meta key for the free version, while for the PRO version it’s located in the wp_posts table under the “post_content” column. So you can modify it after you created the post B.
Another option would be saving the rule in the wp_options table and then load the rule and the fields by using PHP code. This page should give you more idea about it: https://www.advancedcustomfields.com/resources/register-fields-via-php/.
I hope this helps 🙂
