1. Create a new Qt Quick Application project using Creator's wizard.
   • Select CMake as build system for the project.
   • Set the minimum Qt version to 6.2.
   • Keep defaults for the other settings.
2. Try build the project.
   It fails:

   14:34:21: Running steps for project untitled4...
   14:34:21: Starting: "/home/qtrob/qt-cmake/Tools/CMake/bin/cmake" --build /tmp/projekte/build-untitled4-Desktop-Debug --target all
   [1/17 319.8/sec] Generating untitled4/main.qml
   [2/17 135.1/sec] Generating .rcc/qmlcache/untitled4_qmlcache_loader.cpp
   [3/17 87.5/sec] Automatic MOC for target untitled4
   [4/17 105.3/sec] Running AUTOMOC file extraction for target untitled4
   [5/17 130.3/sec] Running rcc for resource qmake_untitled4
   [6/17 155.2/sec] Running rcc for resource untitled4_raw_qml_0
   [7/17 159.0/sec] Running moc --collect-json for target untitled4
   [8/17 89.7/sec] Automatic QML type registration for target untitled4
   [9/17 85.6/sec] Generating .rcc/qmlcache/untitled4_main_qml.cpp
   [10/17 78.7/sec] Building CXX object CMakeFiles/untitled4.dir/untitled4_autogen/mocs_compilation.cpp.o
   [11/17 77.8/sec] Building CXX object CMakeFiles/untitled4.dir/.rcc/qrc_qmake_untitled4.cpp.o
   [12/17 84.8/sec] Building CXX object CMakeFiles/untitled4.dir/.rcc/qrc_untitled4_raw_qml_0.cpp.o
   [13/17 5.9/sec] Building CXX object CMakeFiles/untitled4.dir/.rcc/qmlcache/untitled4_main_qml.cpp.o
   [14/17 6.3/sec] Building CXX object CMakeFiles/untitled4.dir/untitled4_qmltyperegistrations.cpp.o
   [15/17 5.5/sec] Building CXX object CMakeFiles/untitled4.dir/main.cpp.o
   [16/17 5.7/sec] Building CXX object CMakeFiles/untitled4.dir/.rcc/qmlcache/untitled4_qmlcache_loader.cpp.o
   [17/17 6.0/sec] Linking CXX executable untitled4
   FAILED: untitled4 
   : && /usr/bin/g++ -g  CMakeFiles/untitled4.dir/untitled4_autogen/mocs_compilation.cpp.o CMakeFiles/untitled4.dir/main.cpp.o CMakeFiles/untitled4.dir/untitled4_qmltyperegistrations.cpp.o CMakeFiles/untitled4.dir/.rcc/qrc_qmake_untitled4.cpp.o CMakeFiles/untitled4.dir/.rcc/qmlcache/untitled4_qmlcache_loader.cpp.o CMakeFiles/untitled4.dir/.rcc/qmlcache/untitled4_main_qml.cpp.o CMakeFiles/untitled4.dir/.rcc/qrc_untitled4_raw_qml_0.cpp.o -o untitled4  -Wl,-rpath,/home/qtrob/dev/g++-9.3.0/qt-6.2.0-nowebengine-r/qtbase/lib  /home/qtrob/dev/g++-9.3.0/qt-6.2.0-nowebengine-r/qtbase/lib/libQt6Quick.so.6.2.0  /home/qtrob/dev/g++-9.3.0/qt-6.2.0-nowebengine-r/qtbase/lib/libQt6QmlModels.so.6.2.0  /home/qtrob/dev/g++-9.3.0/qt-6.2.0-nowebengine-r/qtbase/lib/libQt6Qml.so.6.2.0  /home/qtrob/dev/g++-9.3.0/qt-6.2.0-nowebengine-r/qtbase/lib/libQt6Network.so.6.2.0  /home/qtrob/dev/g++-9.3.0/qt-6.2.0-nowebengine-r/qtbase/lib/libQt6OpenGL.so.6.2.0  /home/qtrob/dev/g++-9.3.0/qt-6.2.0-nowebengine-r/qtbase/lib/libQt6Gui.so.6.2.0  /home/qtrob/dev/g++-9.3.0/qt-6.2.0-nowebengine-r/qtbase/lib/libQt6Core.so.6.2.0  -pthread  /usr/lib/x86_64-linux-gnu/libGLX.so  /usr/lib/x86_64-linux-gnu/libOpenGL.so && :
   /usr/bin/ld: cannot open output file untitled4: Is a directory
   collect2: error: ld returned 1 exit status
   ninja: build stopped: subcommand failed.
   14:34:24: The process "/home/qtrob/qt-cmake/Tools/CMake/bin/cmake" exited with code 1.
   Error while building/deploying project untitled4 (kit: Desktop)
   When executing step "Build"
   14:34:24: Elapsed time: 00:03.
   

This worked correctly in Creator 5.0.2. Creator 6.0 successfully builds the project when using qmake or setting the minimum Qt version to 5.15.