Hi, @안예리 Welcome to the Microsoft Q&A forum, Thanks for posting your question.
Please refer to this blog https://techcommunity.microsoft.com/t5/azure-database-for-mysql-blog/monitor-azure-database-for-mysql-using-percona-monitoring-and/ba-p/2568545
With the below setting, you should be able to connect.
Hope this will help. Please let us know if any further queries.
Regards
Geetha