Migrate from mysqldb to postgresql

Hi all,
Trying to migrate from percona db to postgresql12 with following command
sudo -u www /opt/local/bin/php /Websites/nextcloud/occ db:convert-type --all-apps --password “xxxxxx” pgsql
This run fine without any issue it also changed the config.php file but when trying to get back in to nextcloud i get this error:
Undefined table: 7 ERROR: relation “oc_external_mounts” does not exist\nLIN
and when i look in to the postgresql db i only see 180 tables and in the perconadb i see 253tables so its not converting all the tables and when i try to switch back into the perconadb it saying want to upgrade again and that fails
so please help
So nextcloud is version 20.2