How to add a trade offer to the shopping cart?

Question

1C-Bitrix

Good day! Couldn't google the solution.
There is a catalog in which some products have sales offers. Also in the product card there is an add to cart button. Also in the card brought trade offers of the goods. Actually, the problem is that if the product has offers, then the add to cart button does not work, which is logical.
Actually, the question itself: if the product has a TP, do I need to replace the link of the button for adding the product to the cart with the link for adding the TP to the cart? Or does it work in some other way?
In my opinion, in the standard IM template from the marketplace, when you click on the TP property, the id of the "Buy" button does not change.