Yeah I noticed this on my phone yesterday. And I only noticed it because I have auto updates disabled for the Play Store and it was asking for an update. When I searched my installed apps list (both in the phone settings and in the Play Store), it did not show up. So not only was this silently installed on my phone without permission, it was hidden from me even seeing it was installed.
Some have speculated that this may only be happening to people who mistakenly (or purposefully) turned on the COVID-19 Exposure Notifications in the Google Settings. But I confirmed that that setting is turned off on my phone and the app still installed silently on my device anyway.
Some have speculated that this may only be happening to people who mistakenly (or purposefully) turned on the COVID-19 Exposure Notifications in the Google Settings. But I confirmed that that setting is turned off on my phone and the app still installed silently on my device anyway.