Chromecast music groups not showing up in Spotify media_player?

Hey folks,

Anyone have any idea how to manage which devices show up underneath my spotify integrated media player?

I have a lot of devices, yet I only see one of my chromecast devices. I’d like to access all of them and especially the chromecast speaker groups. I see all of my devices if I check my speakers on my Spotify application on my computer/phone…

Very thankful for inputs…

Edit: No no, they are note visible further down the list shown above. Just more alexa devices…

Edit2: If i try to execute a spotify playlist on a chromecast speaker group it just ends up playing on one chromecast speaker.
If i manually change Spotify output to my chromecast group named “all” and run the code it stays on “all” and plays the playlist. This means that it has some idea about which speaker(group) it should play on, but it cant get there by itself…
code used:

    - service: media_player.play_media
      data:
        entity_id: media_player.all
        media_content_id: spotify:playlist:1LypOtWkuo9sNN9Q5Ck2JL
        media_content_type: playlist

If i try to play an mp3-file on the speaker group it plays on all the speakers…