Under "Templates" and "Pricing Plans", you can create pricing plans, which you can then provide for the product in the "Checkout page" step.
If you create a pricing plan directly in product creation, you can find it under "Templates" and "Pricing plans" again.
On the overview page Pricing plans, you can then see which pricing plan is used for which product.
The down payment of the payments made by the respective pricing plan is also helpful. For example, you can test pricing plans and see which ones are used more often.