Hello! Here: https://symfony.com/doc/current/messenger.html#amazon-sqs
We have some issue with:
MESSENGER_TRANSPORT_DSN=https://AKIAIOSFODNN7EXAMPLE:j17M97ffSVoKI0briFoo9a@sqs.eu-west-3.amazonaws.com/123456789012/messages

It will not work, because regex is:
^https:\/\/sqs\.[\w\-]+\.amazonaws\.com\/.+

This will be working:
MESSENGER_TRANSPORT_DSN=https://sqs.us-east-1.amazonaws.com/123456789012/messages?access_key= AKIAIOSFODNN7EXAMPLE&secret_key=j17M97ffSVoKI0briFoo9a

Please fix it in docs.