I have a listener registered through NotifyPublish and it is asynchronously getting confirmation and if ack=false then I republish the message or act upon it, but I get delivery tag from this listener channel and I do not know which payload this delivery tag is of.

While looks like we can return the https://github.com/streadway/amqp/blob/v1.0.0/confirms.go#L36 which looks like the delivery tag for the given channel, but we are ignoring it in Publish method https://github.com/streadway/amqp/blob/v1.0.0/channel.go#L1360.