https://www.cnet.com/news/apple-app-store-iphone-ipad-mac-tv-preorder-apps/

Can't wait to get a hot new app? Apple now will let you preorder it in the App Store.

The new feature, which Apple detailed for developers Monday, only works for new apps that haven't been published on the App Store before. They have to hit the store within two to 90 days. Apple notifies you when the app you've preordered is available for download and automatically downloads it to your device within 24 hours.