How to add additional products to product page

[biznazz101]

Hello, I would like to replicate this page and make something similar on another theme in a different store.

We would like the main product and then below have additional products with quantity selectors, when they hit “add to cart” their selected products would be added.

Like this:

I think this is the main code being used but I could be wrong:

Any help or advice on how to do this on a different theme/store would be very helpful! Thanks

[MRamzan]

Here is the solution to add additional products on Product page:

How to Add Bundle Upsell Addon Products in Shopify | Without App