I assume they want to know if people are actually using this app and I don't know if building an analytics platform is the best way for them to spend their time right now.
It does undermine any privacy claims they might make.
It does undermine any privacy claims they might make.
If you look at the code Firebase is in there because the push notifications to notify of infection are sent via Firebase Cloud Messaging.
I also grabbed the Google plist out of the IPA from the app store and it has analytics turned off.
Given that these devs were likely in a hurry, it wouldn't surprise me if they forgot to go back and clean this up after getting it working.
Apple provides such information without any third-party analytics SDKs.