Firstly, check the app settings. Here you can define whether and for which functions the app is allowed to determine your location. Location capture should be activated for the "Parking & Locating", "Refuelling" and "My Trips" functions. Furthermore, the location identification function on the smartphone can be deactivated altogether or just for this app.

Another possible reason for the missing indications: at the start or end of the journey, you stopped at a location where location identification was not possible, e.g. in an underground garage.