AWS limits the number of pricing combinations a vendor can offer today on AWS marketplace. Due to this limitation we are unable to offer APM on our marketplace offering.
Having said that, I'd like to point out that Kibana offered via the AWS Marketplace includes the basic license and is fully APM capable. The pricing restriction only limits us from offering an APM hosted server. As a workaround, you could host your APM server in order to access and use APM.
We are working with AWS in parallel to meet billing requirements so we can overcome the current limitation and offer APM on our AWS marketplace offering. Hope this helps!