Are FreeStyle Libre 2 system glucose alarms¤ visible in the Logbook?

No. Glucose alarms¤ are not displayed in the Logbook.

¤ Notifications will only be received when alarms are turned on and the sensor is within 20 feet unobstructed of the reading device. You must enable the appropriate settings on your smartphone to receive alarms and alerts, see the FreeStyle LibreLink User Manual for more information.