Earlier quoted context omitted.
Which features? getUserMedia is now supported in WebViews, so one can build, for instance, a FaceTime competitor that runs on Chrome on iOS, where it wasn't possible a few months ago. But the Fullscreen API still isn't supported, a blow to the web-based FT competitor. What else?
Isn't Chrome on iOS, just like every other browser on iOS, just Safari?
https://developer.apple.com/documentation/webkit/webview
Before iOS 14.3, getUserMedia didn't work in WebViews. See note 3: https://caniuse.com/stream