This documentation is for a pre-release feature still under development and, therefore, incomplete. As a result, both functionality and documentation are subject to change.
Once this feature is released, it will be announced and this banner removed.
As you may still need to deploy migrated applications to on-premises clients through ConfigMgr there is no recommended cleanup actions post-migration.
Note
If you want to migrate the applicaiton again, delete the deployment created by the previous migration action and start a new migration.