Add the following resources kind at the end of file (as per screenshot)
Microsoft.SQLServer.Windows.Database
Make sure that the adapter instance is collecting from the same collector where the changes were made (Note: This procedure will need to be performed on each collector which hosts the MS SCOM adapter)
Data Sources > Integrations > Adapter instance
Wait for 15 to 20 minutes and the DBs will be mapped.
Wait for 30 minutes to 1 hour and the metrics started to show up.