I am getting the following error regarding UIRecessedMaterialView in my iPad app (iPadOS 17 and Xcode 15 beta 4) as well.
Thread 1: "Could not instantiate class named _UIRecessedMaterialView because no class named _UIRecessedMaterialView was found; the class needs to be defined in source code or linked in from a library (ensure the class is part of the correct target)"
This error occurs frequently on screens that use segment controls, and my app stops crashing when I remove the segment controls from the screen.
Also, if I archive and create an ipa file in Xcode14 even with segment controls and install it on an iPadOS17 device via AppleConfigurator, it no longer occurs.