Locking function in the Volvo Cars app
The Volvo Cars app shows the actual lock status and you can lock and unlock the vehicle remotely.
You can find the lock function in the 
tab.
Note
If an incorrect lock status is shown, open the lock function from the tab and wait 15-20 seconds.
Push notifications
On some models, you can choose to receive push notifications about the vehicle's lock status from the Volvo Cars app.