Trying to allow WAN mDNS access

Hi all! Been using my Beryl AX as a travel router for a while and recently relocated. In my current situation I have a sonos system configured on the WAN network and use my Beryl AX as an isolated, VPN protected network. I am trying to get the devices on my network to see the sonos system on the wan and interface with it, but so far have not had much success. I have done all the standard fixes such as enabling reflector in the dbus daemon and have factory reset my router a few times. Nothing seems to help and any advice would be much appreciated. Thanks!

Hi

You may want to refer to the following tutorial to configure IGMP Proxy so that Sonos device discovery traffic can be forwarded across different subnets: