ITMS-90725: SDK Version Issue - This app was built with the iOS 15.2 SDK. Starting April 2023, all iOS apps submitted to the App Store must be built with the iOS 16.1 SDK or later, included in Xcode 14.1 or later.
I’m not sure if that is the case. Based on this forum topic here last year Appgyver needed to update the SDK in their builds. And from other forums, I have read, Xcode on your local Mac doesn’t matter as the SDK version is within the Appgyver build version. I’m happy to be mistaken but that is what I have read so far.