Go phpMyAdmin

Without click any data base  
Click on =>
Settings > Features > Databases > database_name > Hide databases.

add Values in Hide databases.  

for multiple use.  | 

example : information_schema|performance_schema|mysql|phpmyadmin

https://support.plesk.com/hc/en-us/articles/360000879514-How-to-hide-databases-in-phpMyAdmin-on-a-Plesk-server