How to integrate an Angular 16 application into an existing AngularJS (v1.x) application?

I am working on a project that currently uses AngularJS (v1.x). We want to slowly migrate some parts of it to Angular 16 without doing a complete rewrite at once. Specifically, I want to call a specific route in the AngularJS app and load the corresponding route from the Angular 16 application.

Additionally, I need to store data for a form builder in the Angular 16 app and render that data appropriately within this integrated environment.

What I’ve tried:
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1. Using an iframe: I embedded the Angular 16 application within an iframe in the AngularJS app, but it did not work as expected and had limitations in terms of performance and interactivity.

Is there a better approach to integrate Angular 16 with AngularJS? Are there any best practices or techniques for seamless communication between the two frameworks, especially to pass data between the apps and render it?

What I Need:
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1. Best approach to render Angular 16 content within AngularJS.
2. How to pass data between AngularJS and Angular 16 applications efficiently.
3. Any alternative ideas other than iframes or isolated routes.

I appreciate any help, examples, or resources on how to make this integration smooth!

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