Missing Airplay Clients in Play On

[EdgarK 1]

I have several AirPlay devices/clients on my network, i.e. Bose Home Speaker 500, Airport Express, and occasional Shairport client, all of which work without issue when streaming from an Apple iPhone or iPad.  Unfortunately, only the Bose Home Speaker 500 is visible for streaming (as an Emby Server DLNA client).  None of the other Airplay devices/clients are.  Doesn't matter whether I use web browser or iOS device.  I am running emby server 4.8.11.0 on unraid in a docker container if that matters.