CMS 1C Bitrix, how to add a "buy product" button to a section element if it does not appear there?

Question

1C-Bitrix

And it is also necessary that when you click on the Buy button, a modal window opens in which there are two fields to fill in. This is the Name and phone number. I've looked all over the internet and can't find an answer, maybe someone here can help.

Answer 1

You need to create a button, program js that will call a modal window. A modal window is a web form in which your two fields are created. That's all.
It's not hard.

Answer 2

The statement of the problem is not very clear, what is the edition of the BUS, why does not the button appear, how should the addition to the basket take place, how will the order be placed?