Comment modifier les pages régions

Hello,

I have been trying to find a solution regarding our database for this site but I am blocked by WPMU limitations regarding external SQL queries. I was hoping to brainstorm with you to get an idea before looking elsewhere for another solution.

A little bit of context. Our site is a price comparison website that shows prices per product categories and brands.
We are getting our files from different sources, clean them and prepare them with Google sheets, and then display them on our website.
We use the plugin wpdatatables to display the product list.
You can see the result here (you have to wait for it to load) :
https://compare-tech.fr/smartphones