how to add multiple items to Stripe Checkout?

I have a Stripe Checkout session post API. I have made some products in Stripe, and also made products in Flutterflow with the product ID's generated by Stripe. This is a online shop, so you can add multiple items to your cart. But how do i pass the items to the checkout API? Do i do that with a list? Because you only can add 1 "field" to a list, but with products you have multiple field like name, ID, price etc etc. So how can i pass multiple line items via the inbuild API editor?