A while ago I started working on my first custom card: entity-group-status. A card to group multiple entities together, show them as icons with a color based on the entity status and a single overall status text. A week ago I finally released v1.0 of this card.
More info on how to install and configure it can be found here: GitHub - FamousWolf/entity-group-status: Custom Home Assistant card grouping multiple entities and displaying a status text based on the state of those entities.