Hi @Mark_Mendes,
Thanks for reaching out to let us know about this issue. How is your Anthem connected to your server? Can you share a screenshot of your Roon Audio settings? You can find that page by clicking the gear icon and then clicking the Audio tab.
Did you check if you can install a Roon app on the TV? Maybe if the TV runs Android and has access to the Google store that might work too (but you then would need mouse and keyboard to operate the app unless this is a touch TV).