Unable to display approximate price

HI,

I would need to show site users the approximate price in other currencies of the products present within the e-commerce site. Our goal is to customize the currencies so that we can display another type of data related to the price, specifically we would like to use them to associate a defined quantity of calories, fats, sugars, etc. with each product, showing them at first glance to the customer . The “approximate price” function could be for us and the possibility of customizing the name of the currencies and giving them a fixed value for each product makes it feasible for us.

The problem is that the approximate price (in our case the various attributes of calories, fat, sugars, etc.) is not displayed below the actual price of the product.

How can we solve it?

Below are the accesses to the backoffice and the FTP account.