In the kafka acl grant-access command:
--topic OR --topic-prefix can be passed, but error messages do not make this known - they say "--topic" is required.
The error message must reflect the allowed values.
$ rhoas kafka acl grant-access --producer --user ephelan_kafka_devexp
❌ "--topic" flag is required for consumer and producer operations. Run the command in verbose mode using the -v flag to see more information