Access timers created with voice assistant in automations

I would like to be able to access the timers that are created using the voice assistant in other automations. For example, if I set a timer for 5 minutes, when done I would like it to ping my phone, flash the lights in the room the voice assistant is assigned to. Another use case was with the old style timers, I could display the time remaining on MQTT clocks I have around the house, no longer available with new style timers.