BG96: LTS ALPN extension to connect toAWS IoT at TCP port 443

Is there any way to implement TLS ALPN extension to comunicate with AWS IoT over MQTT stack in BG96 ?
I would like to connect to AWS IoT over port 443 and they say that ALPN “x-amzn-mqtt-ca” is a requirement.
Currently I’m using BG96 with the MQTT protocol embedded on it (AT+QMTxx commands)

Thanks in advance

To connect AWS mqtt , I attach one AT log and one doc for your reference , since the policy of AWS is changing , The latest CA requirements are subject to the official website of AWS. thanks