It’s shit for automating things and especially useless outside the Apple ecosystem, but it does offer the option to turn off sharing.
Apple ID -> Find My -> Share My Location
Since it’s closed source it’s possible they still capture the location and I would t trust it, but in practice anyone that you’ve allowed to see your location (for an hour, day, while on-route) gets a “location unknown” on their app of the toggle is off.
It sounds like she had a better grasp of the legal system than him in all fairness.