(You can also find the downloaded app in file explorer)
Once done, open downloads again and install the google camera apk.
So you might have to use the GCam 7.2 APK Mod by cstark to use on other phones. And from then Google pushed two more updates, but Google Camera 7.2 is only supported on Google Pixel 4 series. These are some of the new features that start appearing from Google Camera 7.0, which appeared a month ago.