I'm trying to build a test store to gauge product-market fit.
I need to replace the checkout page with one that tells the customer that the products are not ready yet but they can subscribe and we would let them know when it's ready.
Is this possible using checkout scripts?
This is not the intent of checkout-scripts.
What your describing is a pre-order customization https://community.shopify.com/c/Shopify-Design/Product-pages-Allow-pre-orders-for-products/td-p/6164...