You should be able to download HERE City Lens. But you're right that it is already incorporated into HERE Maps.
Since the L735 has a magnetometer, you should be able to use this feature in Here Maps. Just launch the app and wait for the app to detect your location accurately (about a few seconds, sometimes instantly). You should be able to see an eye-shaped icon beside your detected location. Tapping on that Eye-shaped icon will launch "Live Sight", which is the equivalent for HERE City Lens.
Alternatively, you can tap on the Layers icon at the lower right of the screen (in HERE Maps). There, you can choose "Live Sight" as your active layer, which is the same equivalent for HERE City Lens.