Hey @kaslerp, welcome to the community, and thanks for reaching out.
It sounds like Roon is not seeing your Lyngdorf Roon Ready output on the network. Since this is a discovery issue, the network setup matters a lot here, and Virgin routers can sometimes add a wrinkle.
To get a clearer picture, could you let us know:
What device is running your Roon Server?
Is the Lyngdorf connected by Ethernet, and is Roon Server on the same router or a separate switch/access point?
Does the Lyngdorf show up anywhere in Roon under Settings > Audio, or not at all?
Have you tried power cycling the Lyngdorf and the router since setting this up?
In the meantime, it would be worth checking our [url=https://help.roonlabs.com/portal/en/kb/articles/networking-best-practices]Networking Best Practices[/url] article, since it covers the network conditions Roon Ready devices need in order to be discovered reliably.
Send over those details and we can take the next step from there.