That 'app' is installed on every Android device.
I don't see how anyone could have missed it.
I despise it myself- because I keep turning it off, and of course, Google keeps turning it back on- every time the device restarts.
This just leads to confirmation of my suspicions of it, obviously.
Anyway, if you want Google to be able to more easilly continuously track you and yours with your phones...
Settings
Google
Security
Find my device
Here is where to turn it on (it will be anyway, thanks(?), Google!) and also a small line stating that it will not work unless location is on.
So they have to track you in order to track you more.
Back to the homescreen, and then
Settings
Security & location
Find my device
(should be about the same as before)
Back up to Security & location
Device admin apps
Be sure your selections are active.