I have about 2 weeks of zwift use in and I noticed one day after a ride that my activity in the companion app showed a map, the route I took, other riders I rode with.
That was my 3rd or 4th ride and it had not done that previously or has it done it since. Instead viewing an activity on the companion app just shows the three charts (timeline, power, heart rate).
I have tried many different things to get the map to show up on rides.
Never deviate from the route
End near where I started
Never let my power drop to zero
Save the ride from the pc instead of hitting stop on the app
Does anyone know the secret sauce needed to get this information to show??