Custom designed card - need your advice

Hi all.
I’m using mushroom ui and other stuff, but can’t find a way to create a horizontal card with icon at the title and ability to add sub title or secondary info for title in template format (ability to change icon color and show statuses of other entities).
Also need to add other card(s) inside of this card.
here is example how it should looks like.
cardexample

Title with icon and sub info it is possible to create in mushroom template card. But there is no option to add other cards inside of this card.
The whole card it kind of glance card, but much more advanced