Subscription produces a lot of replication slots - PostgreSQL

PostgreSQL: All replication slots are in use postgres drop replication slot Replication slots provide an automated way to ensure that the primary does not remove WAL segments until they have been received by all standbys, and that the postgresql replication slot Usage · DROP SUBSCRIPTION cannot be executed in a transaction · execution will fail if the replication slot cannot be dropped, because the publisher is

postgres create replication slot Physical slots are created automatically based on replica hosts and used for data replication within the Managed Service for PostgreSQL cluster