Another top notch video from Christopher Hills and Alex, explains a few updates for switch access on iOS devices (iPhone and iPad primarily these days).
Something switch access is still no good for is for playing "tap-anywhere" action games such as Jetpack Joyride and Badland. It's also not much good for a lot of potential cause and effect apps, such as Beamz and Garage Band.
Android has little over iOS for accessibility, but it can do this. You can also connect a basic mouse and use that as an alternative access device too, which is hugely useful. For switch use, connect a USB On the Go adapter, connect a switch adapted mouse, position the pointer over a key point on the screen, and then tap / tap-hold to your heart's content. Great for taking photos too.