How do I put a drop on a page with a countdown and an alert-me button?

Open the page in the editor, add the Drop block (in the Store section of the block picker), and choose the Product. The block shows the product's first photo, its title (or the Heading you type), the Story written on the product, its edition size, its opening and closing times in the visitor's time zone, a countdown, and the action for where the drop stands: Add To Cart, Preorder, or, before it opens, an Email me when it opens link.

Choose a list under Alert Me List to show that link before the opening time. A visitor who is not signed in gets your website's Join pop-up, which names the drop and has that list ticked; a signed-in member asks in one click. When the drop opens, each of them gets one email on its own, with the product's picture and a button to the drop. The product's Drop section lists everyone waiting, and they are in your Contacts. Leave Alert Me List blank to show no link. Set Show Story to No to show only the price, the times, and the action. The buy button needs your Stripe connected under Payments; the alert link does not.