@Eagle328, Thank you. It's been a LONG time since I had to look into help for rotation. Now my Fire 7 2017 (which has been relegated to function as my ring chime/video) works as I'd hope for that.
That's a terrible design. So many people use tablets for smart home management. When the tablet is mounted on the wall in landscape its a bit difficult to read an interface in portrait. This isn't something that is difficult or time consuming to code, there is literally no good reason for this.