AmqpTransportFactory is in enqueue/enqueue package which is always required by the bundle.
The factory inside does class_exists checks and uses only what is available.

But the RabbitMqAmqpTransportFactory uses DelayStrategyTransportFactoryTrait which I am no using with the following reqs:

"enqueue/enqueue-bundle": "<=1.0.0",
"enqueue/job-queue": "<=1.0.0",
"enqueue/sqs": "<=1.0.0",
"enqueue/redis": "<=1.0.0",
"enqueue/dbal": "<=1.0.0",

Should I always require enqueue/enqueue also ?

You shouldn't, the bundle heavily rely on it and hence require it itself

Are there any errors you face?

The DelayStrategyTransportFactoryTrait is from the ampq-tools package. Which isn't a requirement for enqueue/enqueue nor for the enqueue-bundle. Or am I missing something? I get an error that the Trait can't be found. Since the bundle tries to load the RabbitMqAmqpTransportFactory which uses the DelayStrategyTransportFactoryTrait.

Okay, let's merge this then. Could you please CS issues please?

This is the correct check to avoid adding the TransportFactories?

https://github.com/php-enqueue/enqueue-dev/pull/241/files#diff-21599724c6f8c888b53103436890a85fR60

This is the correct check to avoid adding the TransportFactories?

yeap

Commit contains better fix for this issue 031380e. I kept both changes for now, though ones you added are not needed any more