Okay I got this working on my setup. It was an issue with multi-cast not being allowed on the wireless network as is posted here in the ha forum.
I ended doing the following:
I enabled the mdns on the UDM.
Next I enabled Multicast enhancement on the WIFI network Misc settings.
Next I disabled Multicast Filtering on the WIFI network.
I also turned on IGPM snooping to limit multicast to devices that accept it and protect from DoS attacks.