You could try the following.
Go into your search bar and type in text to speech.
Tap on it and you'll see…
My apologies if this does not achieve what your wanting to do via the phone's settings.
Another possible option is to look at the settings within the Google Maps App itself.
Launch Google Maps App and tap your profile picture and choose settings.
Tap on Navigation Settings.
Then on Voice Selection.
I hope that helps.
Current Phone > Samsung Z Fold³ 5G.