Often times the FM stations have a TuneIn stream available and those work just fine with Roon, if there is a specific station you had in mind I could perform a quick search and try and get you a link, otherwise just posting the TuneIn link to Roon’s Internet Radio (located in the sidebar) should be enough to get you up and running. Hope this helps!
@jeff_kalina - That’s strange, I hear both channels just fine on my end. Are you using any DSP mixing functions and muting a channel? Do other tracks play both left and right channels properly? Can you please post a screenshot of your Signal Path while the station is playing? This should look something like this: