If you want a dedicated gps or music player you can buy one.
In my area you can not use a phone at all while driving a motorcycle even for navigation.
You are allowed to buy a dedicated gps though.
It appears that new drivers are also forbidden from even looking at dash-mounted devices while driving. I get that they might be more easily distracted, and unable to give voice prompts while driving, but they presumably also need more help navigating, with advance lane change warnings, etc. Basically, these laws have not been especially well-calibrated, which is not surprising given that this is true for pretty much all laws regarding new technologies.
1: https://www.nolo.com/legal-encyclopedia/does-california-law-...
Touch device with cellular radio physically attached to car: A-ok
Touch device with a radio not connected to the car? VERBOTEN.