With the parity check, DMA tries to discover unsupported or partially-unsupported features and functions. Although you are performing an assessment of the database you plan to migrate to Azure SQL Database, DMA warns about the database possibly being used on current SQL Server jobs. If the database is used on SQL Server agent jobs, you may need to reengineer the jobs and use Azure Elastic Jobs or Azure Automation to achieve the same.
Azure SQL Managed instance does support SQL Agent jobs as explained here.