ok, I prototyped up a little idea.
Visit
https://subfiresuite.com/m (use
http://subfiresuite.com/m if your server is not HTTPS or is using a self-signed cert - I can't control those).
Hit the 3-bar menu upper left, Settings, in order to log in (I do not in any way cache or pass through your login information to my own servers. It goes directly from your browser/phone to your own server).
Now go to Albums (same 3-bar menu) to get to the normal album queries like the subsonic home page.
Flip the switch for "Playlists?"
You will now see the albums for the songs from your first playlist, in playlist order. Click the query feature to flip through other playlists on your server.
This gives you that feature, more or less. Just create a playlist with one (or more) songs from the themed albums you want to associate, and come to this Album page, it will do more or less what you asked for, providing a list of albums for that playlist, and clicking on the album plays the whole album, not just the one track from the playlist. This mobile app doesn't allow you to browse to append to your queue while it is playing, though I'm adding that feature to the upcoming replacement.
This mobile page is a "Progressive Web App". If you use Chrome to "Add to Home Page" on your Android phone, it will open full-screen like an app when you click it. If you are using https, it will fully install the page as an app like any other.