Lyrics for Individual Tracks and Compilations Please

I would like to see purchased individual tracks as well as album compilations (e.g. Million Sellers) have lyrics available for display. The same music attached to an identified album will display lyrics, whereas tracks of identified compilations do not seem to. At least I haven’t found an exception in my music.

Or, turn it into a question: what info is needed for Roon to retrieve lyrics? Thx, J