Wix Checkout Upsells with ReConvert | Recorded Demo

is it possible to add upsell options to only specific products being purchased? instead of the same upsells to all products?

So does this add the widget to every checkout page automatically, or just the checkout page for the product you currently have open? I want it on some checkouts for some products, but not others. And I want different upsells for different products.

A year ago this said that it would be possible to add this to more locations than just the checkout very soon and yet that still isn't possible...
I want it in Wix cart. When will that be possible? I'll have to use a different app if it isn't coming almost immediately...