Broadcast Radio stations missing in Apple Music

I love using Apple Music to listen to broadcast radio stations, however, I can't seem to find all my favorite channels. For instance Radio Kiss Kiss (search for kisskiss in TuneIn app) with 151,7 followers on TuneIn, can't be found in Apple Music. Is this intended? If so why? I thought broadcast stations that were available in TuneIn were also available in Apple Music, but this does not seem to be the case. I can find stations that are way less popular on TuneIn, so that can't be one of the criteria..