https://www.drupal.org/project/provision/issues/3068257
Migrating a subdirectory site reverts to internal domain & loses alias [#3068257] | Drupal.org
Mar 27, 2020 - As per [#3036890], we should be able to migrate subdirectory sites (e.g. example.com/site1) and maintain the user-friendliness of the subdirectory alias being...