Shopify App Developer

I need you to create an app for me that will update the shopping cart (with a new item) after the customer tries to checkout with an item that is restricted in their state/location.

Example:

Try to checkout with this item. Make sure the address is set to a random address in Illinois.
https://area52.com/products/delta-8-pre-rolls/?attribute_pa_flavor=super-sour-diesel

We need an app functionality with the same as the above.