When using a CMake variable to set the target in qt_add_executable() and qt_add_qml_module() , a new qml file is added in qt_add_executable(), not in qt_add_qml_module().

Steps performed:

1. Create a new Qt Quick project
2. Replace the target name in qt_add_executable() and qt_add_qml_module() with ${PROJECT_NAME}
3. Right click on target name in the project source tree and select Add New... > Qt > QML File
4. The QML file is created and added to qt_add_executable in CMakeLists.txt

Before a new qml file is added:

project(myapp VERSION 0.1 LANGUAGES CXX)
qt_add_executable(${PROJECT_NAME}
   main.cpp
)
qt_add_qml_module(${PROJECT_NAME}
   URI test
  VERSION 1.0
  QML_FILES
   Main.qml   
)
 

After the new qml file is added:

qt_add_executable(${PROJECT_NAME}
  main.cpp
  Test.qml //It should be added in qt_add_qml_module
)
qt_add_qml_module(${PROJECT_NAME}
   URI test
  VERSION 1.0
  QML_FILES
  Main.qml
)