The documentation states: iOS, iPadOS, macOS, and tvOS apps can share a single target. watchOS apps remain in a separate target. Why is that?

When creating a new Multiplatform project on Xcode 14 beta and adding a Notification Service Extension Target, compilation fails with: error build: Your target is built for macOS but contains embedded content built for the iOS platform (Notification.appex), which is not allowed. This really limits the usefulness of the new multiplatform single target, especially if we cannot incorporate basic extensions. Is there any way to use single target multiplatform and still have the freedom to add necessary extensions to the app?