You are using the Enqueue CLient which is a high level abstraction library, it makes queue use as simple as possible, for that you should accept some of its decisions.

IF you need a very custom solution you should use transport directly.

Where can I find an example where I send a message to a queue where the name of the queue is EXACTLY the name I specify in the code ?

https://github.com/php-enqueue/enqueue-dev/blob/master/docs/transport/sqs.md