How to keep Google Maps sounds in Phone, while calls in Car Sound system, while driving?
Current version of Google Maps (10.47.1) seems to support this function:

tap on your avatar icon
tap on &quot;Settings&quot;
Scroll down and tap on &quot;Navigation Settings&quot;
Disable &quot;play voice over Bluetooth

Tested with Bosch Infotainment headunit in Suzuki car and it worked exactly as expected.