Usually the “explanation” I see is that the other planets are part of the conspiracy. Either projections by the shadow government to hide the nature of the world, reflections of other “planets” on the dome separated by the great ice walls, or that they are part of the display. All of which would be cool as hell in a story, but sad when people really believe it
A lot of Flerfs actually acknowledge every other planet is round with only the Earth being flat for some reason.
Usually the “explanation” I see is that the other planets are part of the conspiracy. Either projections by the shadow government to hide the nature of the world, reflections of other “planets” on the dome separated by the great ice walls, or that they are part of the display. All of which would be cool as hell in a story, but sad when people really believe it