Explanation
Both R3load and SSMA can be used to migrate from DB2 to SQL Server. In the options there is not SSMA, but SSMS, the SSMS cannot be use to migrate DB2 to SQL Server. please refer to:
https://techcommunity.microsoft.com/t5/running-sap-applications-on-the/sap-os-db-migration-to-sql-server-faq/b
https://sapnwnewbie.blogspot.com/2013/07/osdb-migration-cmd-str-toc-ext-r3load.html
https://docs.microsoft.com/en-us/sql/ssma/sql-server-migration-assistant?view=sql-server-ver15
https://docs.microsoft.com/en-us/sql/ssms/sql-server-management-studio-ssms?view=sql-server-ver15