Cmake doesn't create the INSTALL project under the OCCT project in Xcode

I have used cmake to create a project of opencascade .I'm using Xcode as the IDE. According to the official documentation(Documentation). After building the opencascade project(OCCT.xcodeproj) which cmake create. You also have to build the INSTALL project under the OCCT.xcodeproj to install the library and header files in specific location(which can be defined in INSTALL_DIR during setting cmake).

Now I can build the OCCT project succesfully. But I can't find the INSTALL project under the OCCT.xcodeproj in Xcode. Is there any setting that I forgot to set.

OCCT.xcodeproj structure

Through the same process. I can find the INSTALL project in Visual Studio 2019. But it's different in Xcode.