Our Dev teams are using Xamarin SDK for apps, is there a step-by-step guide to integrating App data with AAM?
You can check this doc for implementation on Android app: Implementing AAM for Android
Similar steps can be followed for iOS.
You can also leverage Adobe Launch to implement latest Mobile SDK for experience cloud products. That documentation is still in progress, you can keep an eye on this doc: https://docs.adobelaunch.com/
More info on this thread: Re: AAM Segment for mobile App using Adobe SDK