If you find, say, a Telarc recording that you like in Roon, and want to find other Telarc’s, clicking on “Credits” and then on the label name yields only the Telarc’s in your library rather than all of the Telarc’s in Tidal or Qobuz.
The workaround is to scroll down on the same screen to “Engineer” and click on “Jack Renner”. This produces a new screen showing any recording engineered by Renner in your library. Scroll down a little further down and you’ll see the word “Engineer” followed by a number. Click on that and you’ll see every recording in Tidal and/or Qobuz engineered by Renner–that is, not only dozens of Telarc recordings (classical and jazz) but anything else Renner engineered on other labels.
Works for other engineers and for producers. So if you like ECM recordings, click on “Producer Manfred Eicher” and you’ll get a list of every ECM on Tidal or Qobuz.