If Mozilla really cared about user privacy, they would include all the blockers in their main Firefox app and enable them by default. And as already has been pointed out, it includes Google Play Services, which can be used to spy on the user. https://gitlab.com/fdroid/rfp/issues/171. It also has a "run at startup" permission!
It is also comical to me that Firefox Focus does not use Mozilla's Gecko rendering engine, but rather Android's WebView, which is based on Google's Blink (used in Chrome).