Many deluxe albums, compilations or just regular releases from renowned artists consist of dual (or triple) discs in their physical form.
The Spotify desktop app displays little icons for each separate disc that show the user when the album they're listening to is divided like so by the artist. It would be nice to have that simple feature added to the mobile apps, as it often has a meaning for the artist and is part of the art, or just separates the new tracks from the old in a deluxe edition. I can't think of a reason this was not implemented in the app a long time ago, maybe it can be done someday. 🤞