I have a one2many field called "group" in which I can add a parent company to a new company and/or individual I create.
I would like to know where is it inside Odoo that I have to edit so that I could add a tab inside where I view the company that allows me to view what are the child companies of my parent company which I assigned in my "group" field.
Example
https://imgur.com/vXbwlO8