I don't know, but still sounds a bit fishy to me. Rendering to a buffer and then turning that buffer into bytes is a standard feature of any graphical OS - and iOS can't do that without hogging the entire framebuffer and granting security-critical permissions?

Also, how was this supposed to work if the user wanted to switch to another app while keeping the map open on their watch? Doesn't this mean the phone would have force-mirrored the waych the entire time? This feels like a pretty unpolished and impractical UX.

Finally, if the entire point of the permission was to draw on the screen, why would it require access to the buffer while in the background? Or was the permission simply not fine-grained enough?