Shopify Question

I hope someone can make me understand.

Let's say you have an ecommerce store that has
products from various vendors from Aliexpress etc.

If a customer buys one thing from a vendor and one
thing from another how do you explain when they
arrive separetely ?

Or how do you deal with the situation?

You can say you have multiple suppliers which may cause their items arriving separately.

Say you have different suppliers