Question: how to add uirequireddevicecapabilities in info.plist?
Answer: Create a new iOS app.
Set UIRequiredDeviceCapabilities to arm64 only inside app's info. plist.
Add a framework like SkiaSharp and add a simple code reference to it somewhere in the app, something simple like var path = new SkiaSharp. ... 
Build your app for release.
Try to submit using iTunes connect.