New tile card features for media players

Noticed in the 2026.5 release there are new tile card features for media players.

It mentions there is a "select source: a dropdown". Anyone know where this is? I don't see it listed in the features section of the card. I only see:

  • Media player playback controls
  • Media player volume buttons
  • Media player volume slider

None of these seems to have a select source drop down option.