How to migrate multi-value formatted text field in Drupal 8

field_data.txt

value 0 of field_formatted_text
value 1 of field_formatted_text
value 2 of field_formatted_text

migrate_plus.migration.example.yml

id: example
label: 'Example'
source:
  plugin: example
  keys:
    - iid
process:
  type:
    plugin: default_value
    default_value: example
  title: title
  
  # If I had a single value to migrate, it would look like this.
  'field_formatted_text/value': source_field
  'field_formatted_text/format': full_html
  
  # I can import the values this way, but how do I also set the format?
  field_formatted_text:
    plugin: explode
    delimiter: "\n"
    source: source_field

destination:
  plugin: 'entity:node'

I solved it using this technique: https://drupal.stackexchange.com/questions/254248/possible-to-extract-multiple-key-value-pairs-links-from-string-in-csv-and-migr/261232

Hi @eevensen
Thanks for the help. The method worked for me.