entity_browser-8.x-2.x-dev/modules/entity_form/config/schema/entity_browser_entity_form.schema.yml

field.widget.third_party.entity_browser_entity_form:
  type: mapping
  label: 'IEF entity browser existing functionality'
  mapping:
    entity_browser_id:
      type: string
      label: ID of entity browser to be used as replacement for autocomplete field

entity_browser.browser.widget.entity_form:
  type: mapping
  label: 'Entity form widget configuration'
  mapping:
    submit_text:
      type: label
      label: 'Submit button text'
    entity_type:
      type: string
      label: 'Entity type ID'
    bundle:
      type: string
      label: 'Bundle ID'
    form_mode:
      type: string
      label: 'Form display mode ID'