I believe that's deprecated. The right thing to do - though very well hidden - is to use device enumeration:

https://docs.microsoft.com/en-us/windows/uwp/devices-sensors...

This uses mDNS under the hood and works pretty well now. The basics is that you create a device watcher and set it up to look for devices of a specific kind. In this case, you're looking for network-based devices with a specific service type.

It's however somewhat of a pain to get running as there's a lot of details you need to know / figure out before you can get running.