Hello @kartik,
Here is the way I do it:
$connection = null;
$default = 'default';
//For the delayed jobs
var_dump( \Queue::getRedis()->connection($connection)->zrange('queues:'.$default.':delayed' ,0, -1) );
//For the reserved jobs
var_dump( \Queue::getRedis()->connection($connection)->zrange('queues:'.$default.':reserved' ,0, -1) );
$connection is the Redis connection name which is null by default, and The $queue is the name of the queue / tube which is 'default' by default!
Thank you!!