Pre-order using metafields
When you define a preorder metafield, you can easily toggle on or off the preorder feature which converts the Add to Cart button to a Pre-order button.
On the main product page, the Add to Cart button is replaced with a Pre-order button:
When viewing a collection page or any product grid-style section, a PRE-ORDER badge is added to the product:
How to setup
Setting up a preorder metafield is very simple and can be done right in your Shopify Admin.
Create a product metafield with the namespace and key set to:
Set the content type to True or false
In the Metafields section of any product that you’d like to use the feature, change the preorder value to True: