i18n l10n – Export content translation to a similar server

I have 2 instances of the same site created with Drupal. Both have to be translated, and most of the translation work has been done on site A, and we need to get the translations from site A to site B. Site B will have some newer content, but not much and a new version of Drupal (both sites are / are 8.6+).

I can export translations, but they are for the UI only, the content is not exported. Is there a way to export or send the translations in Site A to Site B without having to recompile everything one by one in Site B?

Many Thanks.