See more details at my StackOverflow qustion
First at all, it's important mention that I'm not using CDK as usual. Instead, I'm creating resources on-the-fly programatically. So, basically, I have a multi-tenant application that on onboard it's created a customer root stack, that will be included nested stacks with resources during the customer lifetime.
I have read this documentation but can't figure out how do that. I need to referente a parent existing stack (created by other app, in other moment, in other code base) to a new NestedStack.
This repository have the solution for my problem, reading CloudFormation templates using AWS SDK and mixing with CDK classes.