New project wizard with Qt6 and cmake adds 'Qt5' to CMakeLists.txt

Install Qt6 snapshot binaries.

Launch QtCreator and create new project with the wizard (Application (Qt) - Qt Widgets Application used in test), select CMake for build type and Qt6 MSVC as kit.

AFAIK also the CMAKE_PREFIX_PATH needs to be set manually in build settings.

See the CMakeLists.txt, it has:

find_package(Qt5 COMPONENTS Widgets REQUIRED)
...
target_link_libraries(test PRIVATE Qt5::Widgets)

And the configure (? ) will fail, but when editing the 'Qt5'->'Qt6' build works and app can be launched.