https://www.ibm.com/docs/en/db2-for-zos/13.0.0?topic=catmaint-updating-catalog-installation-migration-db2-13
When you install or migrate to a new release of Db2, you must update the catalog for the prior release to the new version.
utilitiesupdatingcataloginstallationmigration
https://www.ibm.com/docs/en/db2-for-zos/13.0.0?topic=samples-sample-callers-utilities-stored-procedures
You can use the Db2-supplied utilities stored procedures to run Db2 utilities from Db2 application programs by using the SQL CALL statement.
installationmigrationsamplecallersutilities