I doubt it tracks. We use Microsoft company portal which does not access navigation. I work in IT and have not heard of that capability from the monitoring software we'd use to track information. The only thing they should be doing is forcing a lock screen, ability to wipe the device should you leave the company and track data through company portal such as emails and documents...
They'd have to have a separate app designed specifically for accessing navigation details. I don't know if you can kill navi on an apple device but you sure as heck can on Android
My suggestion, if it is his personal phone I'd uninstall all that shiz and make the company provide another phone if they arenintwnt on tracking. They cannot legally force you into this sort of stuff using your own device unless you approve it youraelf...