to create a dynamic link with a deep link you need to provide a PATH name followed by *example.com/APP

Dynamic Link Builder API on iOS and Android. This is the preferred way to dynamically create links in your app for user-to-user sharing or in any situation that requires many links

four ways you can create a Dynamic Link

you must use a URL prefix with either a different domain or a different path prefix

take care that your Dynamic Link URLs don't conflict with your web URLs. When you configure Dynamic Links to use a particular URL prefix, all URLs that begin with that prefix are treated as Dynamic Links, so you can't use URLs with that prefix to point to ordinary hosted content