Hi, I have created a simple Media Instant App with Zoom Controls and Home buttons. When viewing the app on a mobile device the zoom controls disappear, leaving just the Home button. I get the same results with a Basic and a Sidebar app.
I've reported this to ESRI who say it is expected behaviour and have closed the case. Looking further, Experience Builder and Dashboard apps keep the Zoom Control buttons.
Much appreciated if anyone has any ideas or experiencing the same issue.