Modern Buddy

The issue is that it doesn't show up on the left hand side of the screen. Any ideas?

How new is the scooter? Even though there is an electronic readout on the odometer, I think the float inside the tank is still a moving part. When the tanks are dry, sometimes the floats stick. If the scooter is new, sometimes it needs a fill up and then a speed bump to get the float to free up. Sometimes they need a few speed bumps.