Navigation voice is also off in my car ritually since it started talking too much and unnecessarily pointing out places of interest, I always miss turns but oh well. No big deal.
I still wonder if there is a Google assistant command to turn ringers on and off though, maybe one year I'll look it up. I have a feeling that one day soon we may not have a choice of turning notifications off because it gets in the way of fake manufacturer notifications though...
There's a bunch of evil ManuFacturers out there lately creating fake notifications.