Migrating Management Packs When Upgrading SCOM
Management Packs contain the actual monitoring (the workflows themselves) as well as extend the SCOM platforms functionality and are critical to getting your new SCOM Management Group up and running. The good news is most of SCOM Management Packs that worked with SCOM 2012 R2 work right through to SCOM 2019, so you are safe to import them into your new Management Group.