Home Assistant Configuration
rest:
    resource: https://www.xxxx.com
    scan_interval: 3600
    sensor:
      - name: rubbish
        value_template: 'OK'
        json_attributes:
         - "GARDEN"
          - "REFUSE"
          - "RECYCLING"

      - name: rubbish-garden
        value_template: '{{value_json["GARDEN"]}}'
      - name: rubbish-recycling
        value_template: '{{ value_json["RECYCLING"]}}'
      - name: rubbish-refuse
        value_template: '{{ value_json["REFUSE"]}}'

HA Rest Documentation

The above configuration creates a sensor with 3 attributes, it requests a json file every hour in the format shown below and extracts the 3 dates and creates sensors for each of the 3 values.

{"GARDEN":"2021-03-18","RECYCLING":"2021-03-19","REFUSE":"2021-03-19"}