MySQL : How to know if Trigger was fired
You can do it the hard way by enabling MySQL logging (all SQL queries will be logged). I'm doing it when I'm trying to debug &amp; understand complex code base with big amount of SQL queries, with SQL procedures, events &amp; triggers. It's ugly, but it works.

https://support.plesk.com/hc/en-us/articles/213374189-How-to-enable-MySQL-logging-

How to Log All mysql queries into log file?

Debian-based systems:
/etc/mysql/my.cnf

[mysqld]
# Set Slow Query Log
long_query_time = 1
slow_query_log = 1
slow_query_log_file = /var/log/mysql/mysql-slow.log
log_queries_not_using_indexes = 1

# Set General Log
general_log = on
general_log_file = /var/log/mysql/mysql-general.log