user_profile_field_instance.yml

id: user_profile_field_instance
label: User profile field instance configuration
migration_tags:
  - Drupal 6
  - Drupal 7
  - Configuration
source:
  plugin: profile_field
  constants:
    entity_type: user
    bundle: user
process:
  entity_type: 'constants/entity_type'
  bundle: 'constants/bundle'
  label: title
  description: explanation
  field_name:
    -
      plugin: migration_lookup
      migration: user_profile_field
      source: fid
    -
      plugin: skip_on_empty
      method: row
    -
      plugin: extract
      index:
        - 1
  required: required
destination:
  plugin: entity:field_config
migration_dependencies:
  required:
    - user_profile_field