With all previous versions of iOS 10.n release and beta, when an app was installed that contained a call directory extension it would appear in the Call Blocking & Identification section of the settings app almost immediatly.
But with 10.3 beta 3 it is taking at least 10 seconds before it appears (this is on a fast iPhone 7).
Install the app, switch to Call Blocking & Identification, there is nothing there.
Wait, wait some more, keep waiting, then it appears.
This is too slow. It needs to be visible to the user asap after installation so the user can enable it
