The heading card docs show a heading that looks like a multi-line collapsible heading but there seems no explanation on how to create it.
Does anyone has an idea how to create this using the default HA functionality?
Good catch). And a code below does not conform to a picture.
I discovered (by accident) that the greater than sign in the image gets displayed when the Heading Card has a navigate action as interaction. The second line is likely just a Heading Card of the Heading style Subtitle. So no collapsing…
The code: Title (without the entities)
type: heading icon: mdi:fridge heading: Kitchen heading_style: title tap_action: action: navigate navigation_path: /whatever
Subtitle
type: heading icon: mdi:lamps heading: Lights heading_style: subtitle