Hello,

The change that you have mentioned resembles the Frequently Bought Together feature of the Theme through which you can buy extra Product with the main Product, that is fortunately available under the Theme.

You can check out the Theme Documentation guide on that: https://xtemos.com/docs-topic/frequently-bought-together/

Feel free to contact us, if you need any further assistance. We are always there for your help.

Hope this helps !

Best Regards