If it helps, I see this in the build directory:
Debonair$ find . -name vtkRenderingOpenGL2ObjectFactory.h
./CMakeExternals/Build/vtk-ios-device-arm64/Rendering/OpenGL2/vtkRenderingOpenGL2ObjectFactory.h
But not in the final framework:
find vtk.framework -name vtkRenderingOpenGL2ObjectFactory.h
So it looks like the build created the file, but isn’t putting it in the right (or any, really) location in the final product?