Scrap hidden elements

Hello, I would like to scrap some elements hidden behind a button.

Basically you have to click on a buton to make phone number appears.

In the html, at the beggining, code is "input.bouton.ui-btn-hidden" and when you click, it's just a text with the phone number.
But I don't know how to extract it with web scraper and I've looked on other topics but I don't seem to find what I need.

Here is the link of the website I want to scrap

If someone can help me, it would be great !

Thanks !