How to get "Product categories" on "Product list page"

hi everyone,
I want to get the category lists from the custom field stream to the list page. but I couldn’t find any of the objects here that belong to the category.
Based on these examples

Societe:societe/class/societe.class.php
Contact:contact/class/contact.class.php
Product:product/class/product.class.php
Project:projet/class/project.class.php

categorie:categories/class/categorie.class.php
product:categories/class/categorie.class.php

I tried but no result. Thank you for your support

do you already enable the tag/categories module?
if so, do you already create some tag/categories and assign it to some products?

That’s not my point. Categories are normally filtered on top of the list page. but what I want is to appear with the products, price. stock etc. like.

do you mean like this one?

exactly, next to the products should be categories. so add custom fieald I want to get it from SQL.

https://prnt.sc/XGlHxusW868t

If you already add extrafields for the product category.
check here : Extrafields - Dolibarr ERP CRM Wiki

Hope it helps, cheers.