It looks like this was released either in 8.x[0] or 9.x[1] series. Unclear to me which one. That means that only up to about 1/3 of Android devices[2] have the feature. Version distribution is one of the things that seems to tip stuff like this in favor in iOS[3].
Admittedly, the distribution of Android devices on 8.x+ is higher than I even expected before looking at this.
https://developer.android.com/about/versions/marshmallow/and...
By eye, that covers nearly 75% of current devices.