Code model errors with CMake/iOS/Qt6

For some reason the code model for the CMake project misses the "BuiltIn" header path to

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/c++/v1

which leads to e.g. type_traits not being found.

To reproduce:

• install Qt 6.2/iOS
• create dummy CMake Widgets Application
• select Qt 6.2/iOS kit

A corresponding qmake project has this header path. This is strange because as far as I can tell the "BuiltIn" paths all come from the compiler detection: the CMake api reply files do not contain any reference to the other "BuiltIn" paths either. See screenshots.