discourse/app/assets/javascripts/wizard/addon/templates/components/wizard-field-checkbox.hbs

<label class="wizard-container__label">
  <Input @type="checkbox" disabled={{this.field.disabled}} class="wizard-container__checkbox" @checked={{this.field.value}} />
  <span class="wizard-container__checkbox-slider"></span>
  {{#if this.field.icon}}
    {{d-icon this.field.icon}}
  {{/if}}
  <span class="wizard-container__checkbox-label">
    {{this.field.placeholder}}
  </span>
  <PluginOutlet @name="below-wizard-checkbox" @args={{hash disabled=this.field.disabled}} />
</label>