mysql-relay-binlog is not purge in master

[Will Khoo]

I have tons of mysql-relay-binlog files not purge in my master server.
The oldest date is oct 2020...
I have enabled a task scheduler job to flush the log and purge the binary log.
But it doesn't remove the old one, any idea where I am missing?

mysql> SELECT @@global.relay_log_purge;
+--------------------------+
| @@global.relay_log_purge |
+--------------------------+
| 1 |
+--------------------------+
1 row in set (0.00 sec)

mysql> show variables like 'relay_log_purge';
+-----------------+-------+
| Variable_name | Value |
+-----------------+-------+
| relay_log_purge | ON |
+-----------------+-------+
1 row in set (0.00 sec)


Scripts:

mysql --user=xx_user --password=xx_pwd flush-logs


mysql -uxx_user -pxx_pwd -e PURGE BINARY LOGS BEFORE NOW() - INTERVAL 1 day;