Hi there sharwalnutcreek,
We understand you're experiencing an issue with not hearing navigation directions when outside your home,e and we'd like to see if we can assist.
Do you experience the same issue with navigating through the Maps app?
If not, and the issue only occurs with Google Maps, give the steps here a try: If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open
While the title doesn't mention this issue specifically, the steps may help resolve it.
If so, and you're using walking navigation, try connecting headphones and see if the issue persists.
Also, head to Settings > Maps > Navigation & Guidance, and make sure Normal Voice is enabled.
Thanks!