App stopped working on iOS 16 with some devices - how to debug?

Hello 👋,

after people updating to iOS 16 I was getting reports that my tuner app is not working anymore for some people. The mic is working and also everything else except the pitch detection.

There seems to be a connection with the device it is running on - it seems to not be working on iPhone 11 Pro. In the iPhone 11 Pro simulator it works though, and also with every other device I tested with. Any hints how I could debug this issue further without having an iPhone 11 Pro? Without being able to reproduce the bug it is impossible to fix... No compiler warnings or anything 🫤

Maybe someone has an idea how to deal with this 😎 - have there been changes in iOS 16 that could be related? Thx 🙏