How can I import a specific type block? I have created some blocks of a specific type, in Drupal 8, and I want to import them into the cloned instance.

There is no core import feature available. How can I achieve the task?

They don't get imported by the configuration synchronization; if you try, you will get the error


  This block is broken or missing. You may be missing content or you might need to enable the original module.


and no listing in custom block library.
As per my further research I found that there is a module named Content Synchronization which works well with the same issue. As in Drupal 8 blocks as served as content now and block types as entity types.