There are two possibilities about zuma. 1. That it is our weapon to use against NK. 2. That it is a cabal weapon and we engaged it on launch and destroyed it. But then why would we let it be launched at all? So I think it's #1.
In any event, it's not causing earthquakes around the world. Maybe one or two tests to prove the system.
We just have to wait and see. If we needed to know, Q would tell us. If he didn't want us talking about it, he would not have mentioned Sky Fortress.