AWS MQTT 5 doesn't support new MQTT features

Question

Amazon announced MQTT 5 support:
https://aws.amazon.com/about-aws/whats-new/2022/11/aws-iot-general-availability-version-5-mqtt-message-broker-mqtt5/

But doesn't support some features its important for MQTT 5.0 like:
• Ability to send PUBACK Reason Code 0x10 for no matching subscribers.
• Ability to send PUBACK Reason Code 0x99 for payload format invalid.

How I can know when it will be implemented or if these features will be implemented in AWS Broker?

Accepted Answer

These features are not available at the moment as I do not see them listed here [1]. Moving ahead, to keep up to date with new features, you can track [2].

[1] MQTT - MQTT reason codes - https://docs.aws.amazon.com/iot/latest/developerguide/mqtt.html#mqtt5-reason-codes

[2] https://aws.amazon.com/about-aws/whats-new/internet-of-things/?whats-new-content.sort-by=item.additionalFields.postDateTime&whats-new-content.sort-order=desc&awsf.whats-new-products=general-products%23aws-iot-core

AWS MQTT 5 doesn't support new MQTT features

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