MariaDB [(none)]> show grants for root@'localhost'\G

*************************** 1. row ***************************

Grants for root@localhost: GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, RELOAD, SHUTDOWN, PROCESS, FILE, REFERENCES, INDEX, ALTER, SHOW DATABASES, SUPER, CREATE TEMPORARY TABLES, LOCK TABLES, EXECUTE, REPLICATION SLAVE, BINLOG MONITOR, CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, CREATE USER, EVENT, TRIGGER, CREATE TABLESPACE, DELETE HISTORY, SET USER, FEDERATED ADMIN, CONNECTION ADMIN, READ_ONLY ADMIN, REPLICATION SLAVE ADMIN, REPLICATION MASTER ADMIN, BINLOG ADMIN, BINLOG REPLAY ON *.* TO `root`@`localhost` IDENTIFIED VIA unix_socket WITH GRANT OPTION

*************************** 2. row ***************************

Grants for root@localhost: GRANT PROXY ON ''@'%' TO 'root'@'localhost' WITH GRANT OPTION

2 rows in set (0.000 sec)

Previously on 10.5.8

MariaDB [(none)]> show grants for root@localhost\G*************************** 1. row ***************************

Grants for root@localhost: GRANT ALL PRIVILEGES ON *.* TO `root`@`localhost` IDENTIFIED VIA unix_socket WITH GRANT OPTION

*************************** 2. row ***************************

Grants for root@localhost: GRANT PROXY ON ''@'%' TO 'root'@'localhost' WITH GRANT OPTION

2 rows in set (0.000 sec)