[tristador]

For Android, preinstalled apps are set by the phone manufacturer. I suppose each manufacturer could pick their favorite 2fa app and install it. There is some pressure not to install apps that the user doesn't need as it's bloatware. I'm not sure what percentage of users currently use an authenticator app.

[kensdorf]

Right, but the idea is that a lot more people might use this if more sites offered it and it was a built in feature of the device.

[tristador]

Looking at play store quickly:

Facebook, which I've seen preinstalled on phones, has 5B+ downloads.

Google authenticator has 10M+ downloads. It's not that popular relative.