As the versions of changed, the underlying client libraries have also been being changed, and yes, they are becoming more secure by default.
With 20.1, the certificate related details have been moved to the front page of the connection dialog. You can see details explained here: https://techcommunity.microsoft.com/t5/sql-server-blog/upcoming-changes-for-sql-server-management-studio-ssms-part-1/ba-p/4059495