LOCK TABLES in BEGIN NOT ATOMIC block causes error

Executing the following SQL code (no transaction, SQL code passed via ODBC as single ADO.Execute statement):

BEGIN NOT ATOMIC

  LOCK TABLES MyTable WRITE;

  INSERT INTO MyTable (name) VALUES ('test');

  UNLOCK TABLES;

END

I get this error:

Microsoft OLE DB Provider for ODBC Drivers: [ma-3.1.17][10.11.2-MariaDB]LOCK is not allowed in stored procedures

There are some issues:

1. I am not using any stored procedure. So there should be no reason to disallow this. If this is also disallowed in BEGIN/END blocks, then the error message is wrong.
2. The official MariaDB documentation says "LOCK TABLES can not be used in stored routines - if you try, the following error will be produced on creation. This restriction was removed in MariaDB 10.6.2". My MariaDB version is newer than 10.6.2 but I still got this restriction. Is this a bug? Or is the documentation wrong? See: https://mariadb.com/kb/en/lock-tables/