my client sells bags with 10 options and each option has 5-20 colors. So I cannot use products or variants to handle that. Since it is a small store, we will not pay for shopify plus. I would like to call the checkout page with a string of options from an external page. So, there is no actual need for a product page.
We just need to:
Show the options in the checkout page (as a confirmation for the customer)
Show the options in the admin page "Orders", so that my client knows what to send