This is not true. But I might know what’s going on here!
For this feature to work, you need to turn it on first. You can do so in the Navigraph settings, accessible by navigating to Aux > Navigraph Settings in the G1000 using the right rotary knob!
Once in there, you should see an option labelled “Broadcast Position” - turn that on and you should have working moving maps! Make sure that you are signed into the same account in both the aircraft and in the Charts application.
Kind Regards,
Malte