In Xcode 10.2 beta 3 just created an app and a Call Directory extension (just the default automatically generated code). The app does not appear in the phone settings: Settings -> Phone -> Call Blocking & Identification. The device is iPhone X. Tried on iPhone 5S too - the same.
Probably, I'm doing something wrong. I tried two apps from the App Store using Call Directory and both appeared in the phone settings.
I've tried the manual manage signing - no luck. How to solve this problem?