Show switch status icon instead off switch in group

Hi All

I have created a Node-red light scheduler and also using MQTT
So I end up with this:
image

But I don’t want someone to turn it off or on by mistake, so I thought that I could make a binary sensor
to get something like this:
image status: OFF

# binary_sensor.light_scheduler_state
  - platform: template
    sensors:
      light_scheduler_state:
        value_template: >- 
          {% if is_state('switch.sonoff_pow_r2_1', 'on') %}
            off
          {% else %}
            on
          {% endif %}
        icon_template: >-
          {% if is_state('switch.sonoff_pow_r2_1', 'off') %}
            mdi:power-plug-off
          {% else %}
            mdi:power-plug
          {% endif %}
        friendly_name: 'Outdoor Light Auto Scheduler'

And a group:

      power_sensor_1:
        name: Garden Lights
        control: hidden
        entities:
          - binary_sensor.light_scheduler_state  <-------- Here
          - switch.sonoff_pow_r2_1    
          - sensor.powerfactor_outdoor_light
          - sensor.energy_outdoor_light
          - sensor.power_outdoor_light
          - sensor.voltage_outdoor_light
          - sensor.current_outdoor_light

But I think I have made it to complicated?

Best regards
Casperse

Anybody who can tell me how to show the status only without the possibility to switch it off?