While this is likely meaningless to anyone other an accessibility professionals, in short it means you are providing the minimum level of accessibility features required to make your app usable by the majority of people. For both Android and iOS when you create a new app, the app supports landscape mode out of the box, and all you need to do to continue supporting it is to build robust interfaces, and not disable it. If your app wasn’t built with landscape in mind it’s now worth checking your app’s screens in a landscape orientation.