More view help, please - How do I see my sensors?

I have an ESP8266 sensor in my attic that sends an mqtt message once a minute with the attic temperature. With no default_view: in the groups.yaml file, I can see the Attic Temp as a badge (image below):

However, when I put default_view: back into groups.yaml, I can’t get the attic sensor to show. I tried adding it to the upstairs group, tried making a separate group for the sensor, but it just won’t show. (image below):

So, what am I doing wrong?
Many thanks…

Sig

Here is my groups.yaml file:

#groups.yaml:
#
#  Downstairs:
  default_view:
    view: yes
    name: Downstairs
    entities:
      - group.downstairs_lights

  Upstairs:
    view: yes
    name: Upstairs
    entities:
      - group.upstairs_lights
      - group.upstairs_sensors
      
  Cameras:
    view: yes
    name: Cameras
    entities:
      - camera.amcrest_camera
      - camera.office
      - camera.garage

  Basement:
    view: yes
    name: Basement
    entities:
      - switch.workshop_light_
      
  Current_Weather:      
    view: yes
    name: Weather
    entities:
      group.wunderground
    
  ############ Groups ############
  #
  downstairs_lights:
    view: no
    name: Downstairs Lights
    control: hidden
    entities:
      - light.dimmer
      - switch.inovelli
#      - light.inovelli_unknown_type1f01_id1f01_level
#      - input_number.dimmer_brightness
      
  upstairs_lights:
    name: Upstairs Lights 
    view: no
    control: hidden
    entities:    
      - light.kim
      - light.steve
      - switch.desk_light
      - switch.tasmota_test
      - switch.studio_light
      
  upstairs_sensors:
    view: no
    name: Upstairs Sensors
    entities:
    - sensor.attic_temperature    
      
  wunderground:
    view: no
    name: Wunderground
    entities:
      - sensor.pws_pressure_in
      - sensor.pws_alerts
      - sensor.pws_observation_time
      - sensor.pws_precip_today_string
      - sensor.pws_temp_f   
      - sun.sun
  upstairs_sensors:
    view: no
    name: Upstairs Sensors
    entities:
    - sensor.attic_temperature 

Should be;

  upstairs_sensors:
    view: no
    name: Upstairs Sensors
    entities:
      - sensor.attic_temperature 

Thanks. Wow, those indents should be so obvious… but no change.

does the group show up in your states page?

Thanks for jumping in. Doh-20.

Wellll… It’s a learning moment. Due to your question, Finity, I started looking closer and… Well, let’s just say I plan to copy my entity names from the states window from now on.

This works:

  upstairs_sensors:
    view: no
    name: Upstairs Sensors
    entities:
      - sensor.attic_temp