Hello @aj_BILUMANE. Welcome to Roon and Live Radio!
There aren’t that many hires stations out there. In Roon search for Flac and scroll down to get the radio stations.
(If you know of any more please let us know)
A word of warning - some stations are presently adding metadata to their streams in a way that causes Roon to stop at the end of a track. This post Jb radio plays one song then stops lists them.
Roon is aware.