My Idrive stopped seeing the Spotify option a couple weeks ago after Spotify updated itself to the latest version (8.5.68.904).
If you're on android, you can go here and pick up an older version:
https://spotify.en.uptodown.com/android/versions
For me, Spotify integration works on version: 8.5.66.1002.
I'm using a Galaxy Note 10+. July security patch.