I tried the below command
mysql> GRANT SELECT, RELOAD, SHOW DATABASES, REPLICATION SLAVE,
REPLICATION CLIENT ON *.* TO 'debezium' IDENTIFIED BY 'dbz';
It gave the following error
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'IDENTIFIED BY 'dbz'' at line 1
To grant all privileges use GRANT ALL
GRANT ALL ON *.* TO 'debezium'@'%' IDENTIFIED BY 'dbz';
You are missing the host in your query I added %
you can log in from anywhere, change it based on your needs.