iFixit has discovered in its recent teardown of the 2018 13-inch MacBook Pro with Touch Bar that Apple has removed the Customer Data Migration Tool connector from the logic board. The connector helped in transferring data to a functioning MacBook in the event of a logic board failure but it now looks like customers should use inbuilt backup options such as Time Machine on a frequent basis to safeguard their data.
https://www.notebookcheck.net/Apple-removes-the-Customer-Data-Migration-Tool-connector-in-the-the-2018-MacBook-Pro-with-Touch-Bar.318186.0.html