I am currently testing to migrate my node-red APP to AWS (on IBM cloud right now).
Just saw your work which is great.
Before I actually test it, I was trying to figure out how to connect AWS IOT Core into the redundant instances of node-red.
With IBM cloud, I was using a feature called "shared subscription" (discussed here Multiple Node-red instances in IBM cloud for redundancy not working for me - #2 by knolleary) which allows a mqtt message to be distributed to a single instance of nodered. This feature is not available on AWS.
So once you have your dual node-red instance, do you know a way that an incoming IOT core mqtt message is actually load balanced to only one of the nodered instances? Otherwise obviously all instances will get and process the message which is a waste of resources and more than that creates dual data logs and other issues.
