You can find information about Sensor Name changes here.
As ADC names can be changed to whatever you want without the same limits of panels, after a sensor has been installed and synced once, the name will not later change if you make an update to it on the panel. This is to ensure custom ADC names are not overwritten.
You can request a sensor name update command be sent, but this will overwrite all Alarm.com names with current panel names. It is typically easier to manually change the name to match in ADC under Settings - Devices.