Syntax:
SHOW RELAYLOG EVENTS
    [IN 'log_name']
    [FROM pos]
    [LIMIT [offset,] row_count]
    [channel_option]

channel_option:
    FOR CHANNEL channel

Shows the events in the relay log of a replica. If you do not specify
'log_name', the first relay log is displayed. This statement has no
effect on the source. SHOW RELAYLOG EVENTS requires the REPLICATION
SLAVE privilege.

URL: https://dev.mysql.com/doc/refman/8.0/en/show-relaylog-events.html

