Currently when a PE Timer is up it just rings a sound (not-configurable afaik). Please use voice to give the name of timer!
I’m having the same issue. I really wish there was a way to change the sound when a timer is done or at least adjust the volume of the sound. It doesn’t sound good or smooth at all over the Voice PE. Also, I can’t find any way to dismiss the timer sound going off other than to walk over to the PE and press the button.
I have built my own timer version on HA now. GPT-5, 5 Timers, 3 intents, 1 automation. Works quicker and I can customize the responses and commands. 