Hi,
We will track the customer demand and consider adding this feature based on the interest. As a workaround developers can access and subscribe to the private navigation service and its "changes" event, e.g.:
https://stackblitz.com/edit/angular-1tjhx7-sjesa3?file=src%2Fapp%2Fapp.component.ts
Regards,
Dimiter Topalov
Progress Telerik