I'll say it again, the example you sent | Home Assistant | Page 1

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mqtt:
  binary_sensor:
    name: 'Bathroom Door'
    state_topic: 'tele/RF_Bridge/RESULT'
    value_template: >-
      {% if value_json.RfReceived.Data == '2C8D0A' %}
        {{'ON'}}
      {% elif value_json.RfReceived.Data == '2C8D0E' %}
        {{'OFF'}}
      {% else %}
        {{states('binary_sensor.bathroom_door') | upper}}
      {% endif %}
    device_class: door

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That is the example from
https://community.home-assistant.io/t/sonoff-rf-bridge-strategies-for-receiving-data/108181
converted to the current MQTT format.

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You said you already have working MQTT stuff, and you don't share anything, so you will have to meld this yourself. Obviously the topic, the binary sensor you need to create, and the data code are all going to be different.

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If you still don't get this I don't think I will be able to help you more than that. I am not in the business of writing code for others other than the stuff I write and share publicly (Blueprints, Custom Templates, etc). Individuals not so much. As a volunteer I have the choice on what and who I help.
Anger and accusations are not going to help your cause.

#I'll say it again, the example you sent