The custom view will be available once you switch to a tablet. However, small Android tablets usually have really bad specs. It will be laggy using H9 Control on a small Android tablet. I would recommend iPad mini if you want a small tablet.
Sorry if this is a stupid question, but how does the H9 app know if it’s on smart phone or a tablet? From what I can see, it’s the same app for both. If that is correct, then I guess there’s a difference between phone and tablet operating systems that causees the custom view to work or not?