Not sure about ESPN and Compass. Given that Compass Media has the rights to some live sports such as NFL football, I doubt they'd syndicate a sports network that also has play by play sports and would thus put their own product at a competitive disadvantage.NBC News also has a deal with iHeart. Audacy is partners with CBS for the CBS Sports Radio Network. Last I checked it was syndicated by Westwood One. I believe ESPN Radio is now syndicated by Compass Media. ABC News Radio is syndicated by SkyView. I believe they also syndicate CBS News Radio.
ABC and SkyView separated at the end of 2023. But you are correct about Skyview and CBS.