Friendly name is just the display name of the sensor. Your sensor name is still “binary_sensor.aeotec_zw100_multisensor_6_sensor_2” when your using it in groups or automations. You should see it at that name listed in your states panel.
Cheer’s buddy this is the case. Is there a way to change it though so rather than binary_sensor.aeotec_zw100_multisensor_6_sensor_2 i could call on say sensor.bathroom_sensor rather than using the whole name?
I am also trying to get a ui state to say if motion is actually detected in that room but cant work that out at all.