Want to make a simple room overview

Configuration Frontend
4

Yes it will require customization and there are multiple ways and cards to accomplish it.

For example…
image

type: vertical-stack
cards:
  - type: custom:mushroom-light-card
    entity: you.device
    card_mod:
     style: |
       ha-card {
         background: none;
         border: none;
         }
  - type: custom:mushroom-chips-card
    chips:
     - type: template
       icon: mdi:mushroom
       icon_color: red
     - type: template
       icon: mdi:home  
       icon_color: blue
     - type: template
       icon: mdi:home  
       icon_color: blue
     - type: template
       icon: mdi:curtains
       icon_color: cyan
     - type: template
       icon: mdi:lamp 
       icon_color: green

Check out this guide