innodb_encrypt_tables cannot be set to ON in MariaDB 11.8.3 (LTS UBI), but docs don’t mention pre-requisite key management installation

SET GLOBAL innodb_encrypt_tables = ON;
ERROR 1231 (42000): Variable 'innodb_encrypt_tables' can't be set to the value of 'ON'

innodb_encrypt_tables cannot be set to ON in MariaDB 11.8.3 (LTS UBI), but docs don’t mention deprecation.
However, the official documentation does not indicate that this variable has been deprecated, removed, or replaced, nor does it describe any prerequisite configuration (such as plugin dependencies or compile-time options).

https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_encrypt_tables