Yes, only the 'collapsable' lenses will all any usefulness with the back movements. With lenses in their normal position, the back has to be against the camera to focus at infinity. The collapsing lens allows the back to be moved away from the camera and still focus.
You can, however, use the moveable back for close-up work, as it works just line and extension tube/bellows.
I really like the Super 23. It's really sturdy, the lenses are good, and used right, the back is useful. On the other hand, it's a fully manual camera. You have to remember to pull the slide, cock the shutter, advance the film all separately. No different really than a view/field camera - it's just that most people aren't used to this. (Now, if I could just develop my dark slide, I'd have some really good photos!)