Is there any option to add a scale bar to the map?
I read the documentation but I couldn't find anything about this.
There is no built in scale bar yet, but we do plan to add a control for this soon. I'll take a look at creating a code sample on how to create a custom one.
Update: I've added a code sample to the official Azure Maps code sample gallery here: https://azuremapscodesamples.azurewebsites.net/?sample=Simple%20Scale%20Bar%20Control