doc sql-grant.html Synopsis error?

Hi.
--work as intended.
grant ALL PRIVILEGES on FUNCTION pg_catalog.pg_reload_conf() to test;
grant ALL PRIVILEGES on FUNCTION pg_reload_conf() to test;

-------------errors. it should be work, or I interpret the doc the wrong
way?
GRANT ALL PRIVILEGES ON FUNCTION pg_reload_conf() IN SCHEMA pg_catalog TO
test;
GRANT ALL PRIVILEGES ON FUNCTION pg_catalog.pg_reload_conf() IN SCHEMA
pg_catalog TO test;

doc: https://www.postgresql.org/docs/current/sql-grant.html

GRANT { EXECUTE | ALL [ PRIVILEGES ] }
ON { { FUNCTION | PROCEDURE | ROUTINE } *routine_name* [ ( [ [
*argmode* ] [ *arg_name* ] *arg_type* [, ...] ] ) ] [, ...]
| ALL { FUNCTIONS | PROCEDURES | ROUTINES } IN SCHEMA
*schema_name* [, ...] }
TO *role_specification* [, ...] [ WITH GRANT OPTION ]
[ GRANTED BY *role_specification* ]

I am using postgres 16, but the grant function part does not change.
What did I miss?