MicrosoftJannep when you install the version-agnostic management pack on SCOM where there already are the version-specific MPs for SQL 2008-2016, the new management pack won't discover and monitor SQL 2012-2016 by default. It was made to avoid double monitoring. If you want to monitor SQL 2012-2016 with the new management pack, you can either remove the version-specific management packs before importing the new one or, if you have already imported it, override the DB Engine discovery so it begins to discover SQL 2008-2016. Also, in the latter case, it's up to you when to remove the version-specific MPs - before or after enabling the new MP to discover SQL 2012-2016.
How to enable the monitoring of SQL 2012-2016 is described in the operations guide to this management pack in the section "Turning on the monitoring of SQL Server 2012-2016."
