@SPC123 are you judging your hypo entirely on your Libre oppression are you checking those lows with a finger prick. Libre can should false lows if you are dehydrated or if you apply pressure to the sensor or just because it is not accurate.
If you want to include the alarms with Libre, there are options to “pimp your sensor” with Miaomiao or Bubble. These convert the NFC to Bluetooth which sends updates to your phone which can buzz if you go high or low.