Import/export is supported (see https://github.com/p2-inc/keycloak-orgs/issues/147). That said, import/export from admin console does not include users nor organizations. You can export organizations with the CLI (see https://www.keycloak.org/server/importExport#_exporting_a_specific_realm) to see the expected format. You can then import again your realm with the CLI too but also with the /admin/realms Rest endpoint what is simpler than configuring everything with finer grain Rest endpoints.