Using WHM / cPanel is good stuff maybe not powerful enough. If you have multiple MySQL Databases and want to bulk run repair tool – it’s not possible unless you SSH / Command Line it.
Run the command
mysqlcheck --all-databases --fastto bulk (or mass) repair all MySQL databases.
If you remove the --fast from command, database repair will take longer but do a better job because it’s checking ALL tables, not just the tables that have not been closed properly.