As far as I tried, now zoom is <18. Would be possible go for 18? I’d like to use the service to check wheelchair routing, but at 17 it is often difficult to get most of information.
we are aware of this issue. Some map types do not support zoom levels >17, that is why we currently have this restriction. We will look into specifying the zoom level for individual maps in the coming few weeks, but a greater zoom will be available at latest when we deploy our new frontend. This will take another few months.
Sorry for the inconvenience.