I agree. Full access to all albums of an artist in your library should be possible via the artist view in CarPlay. What else is the artist view good for then? It’s the easiest way to directly navigate to a specific album by a specific artist.
Also for instance the Apple Music App itself has no issues to list all albums by an artist in your library in CarPlay, so it’s definitely possible in CarPlay. But you need to use a different list type (not horizontal but vertical).
I brought up the same issue a while ago in this support thread https://community.roonlabs.com/t/limited-album-display-in-carplay-artist-view-on-arc-ref-e33m58/309331/5
and also made some suggestions on how to solve the issue but it was put aside as being “not a bug, but a feature” and closed soon after.
Not happy with this either, but Roon doesn’t seem to be interested in changing this.
Then again, my library is small enough to completely fit on my phone, so I mostly use Apple Music with the library on the phone. More reliable and easier to use than RoonARC anyway.