styrbar.yaml

blueprint:
  name: Styrbar multiple lights
  description: A blueprint that allows Ikea styrbar light controller to be used to controll multiple lights made by Zuul.
  domain: automation
  input:
    controller:
      name: Controller
      description: The styrbar controller to be used to controll the lights.
      selector:
        entity:
          domain: sensor
    
    light_number:
      name: Light number
      description: An input_number helper with minimum value 1 and maximum value of at least the amount of lights used. This input should be configured to use increments of 1.
      selector:
        entity:
          domain: input_number

    light_brightness:
      name: Light brightness
      description: The brightness the lights will be when turned on by the controller.
      selector:
        number:
          min: 0
          max: 100
          unit_of_measurement: "%"

    lights:
      name: Light(s)
      description: The lights that will be controlled by the controller.
      selector:
        entity:
          domain: light
          multiple: true

variables:
  light_number: !input light_number
  lights: !input lights
mode: restart

trigger:
  - platform: state
    entity_id:
      - !input controller
    to: "on"
    id: "on"
  - platform: state
    entity_id:
      - !input controller
    to: "off"
    id: "off"
  - platform: state
    entity_id:
      - !input controller
    to: "arrow_left_click"
    id: "arrow_left_click"
  - platform: state
    entity_id:
      - !input controller
    to: "arrow_right_click"
    id: "arrow_right_click"
  - platform: state
    entity_id:
      - !input controller
    to: "brightness_move_up"
    id: "brightness_move_up"
  - platform: state
    entity_id:
      - !input controller
    to: "brightness_move_down"
    id: "brightness_move_down"
  - platform: state
    entity_id:
      - !input controller
    to: "brightness_stop"
    id: "brightness_stop"

action:
  - choose:
      - conditions:
          - condition: trigger
            id: "on"
        sequence: 
          - service: light.turn_on
            target: 
              entity_id: "{{ lights[int(states(light_number)) - 1] }}"
            data:
              brightness_pct: !input light_brightness
      - conditions:
          - condition: trigger
            id: "off"
        sequence: 
          - service: light.turn_off
            target:
              entity_id: "{{ lights[int(states(light_number)) - 1] }}"
      - conditions:
          - condition: trigger
            id: "arrow_left_click"      
        sequence: 
          - service: input_number.set_value
            data:
              value: >-
                {% if int(states(light_number)) > 1 %}
                {{ int(states(light_number)) - 1 }}
                {% else %}
                {{ lights|length }}
                {% endif %}
            target:
              entity_id: !input light_number
      - conditions:
          - condition: trigger
            id: "arrow_right_click"       
        sequence: 
          - service: input_number.set_value
            data:
              value: >-
                {% if int(states(light_number)) < lights|length %}
                {{ int(states(light_number)) + 1 }}
                {% else %} 1
                {% endif %}
            target:
              entity_id: !input light_number

      - conditions:
          - condition: trigger
            id: "brightness_move_up"
        sequence:
            - repeat:
                until:
                  - condition: trigger
                    id: brightness_stop
                sequence:
                  - service: light.turn_on
                    target:
                      entity_id: "{{ lights[int(states(light_number)) - 1] }}"
                    data:
                      brightness_step_pct: 10
                  - delay:
                      hours: 0
                      minutes: 0
                      seconds: 0
                      milliseconds: 500

      - conditions:
          - condition: trigger
            id: "brightness_move_down"
        sequence:
            - repeat:
                until:
                  - condition: trigger
                    id: "brightness_stop"
                sequence:
                  - service: light.turn_on
                    target:
                      entity_id: "{{ lights[int(states(light_number)) - 1] }}"
                    data:
                      brightness_step_pct: -10
                  - delay:
                      hours: 0
                      minutes: 0
                      seconds: 0
                      milliseconds: 500
  

        

I can't post a PR but I forked the project and added support for update entities for the remote
https://gist.github.com/gilgoldzweig/c823f9caaa8ab85d2ed2627582f1cab7