I have nativily built Qt 6.2.3 on raspberry and have no other version of Qt. The configuration parameters I'm using 

-shared -static -glib -gtk -opengles3 -opengl es2 -eglfs -egl -opensource -confirm-license -release -qpa eglfs -prefix /usr/local/Qt-6.2.3

Tested on a small hello world app with command line and everything works ok

I'm compiling or trying to on the actual raspberry device. Since th SD card is slow and doesn't have enough capacity, I've extracted the sources on a networked hard disk, trying to compile there and on success install on the SD card. 

Step 1:  cmake -DCMAKE_BUILD_TYPE=Release -G Ninja
Step 2:  cmake --build .
Step 3:  cmake --install . --prefix /usr/local/QtCreator-7-with-Qt-6.2.3

But I have errors during step 1, the same if I use cmake-gui or even command line passing the path of Qt, LLVM and QtCreator

"-DCMAKE_PREFIX_PATH=/path/to/Qt;/path/to/llvm" \path\to\qtcreator_sources

The errors are:

CMake Error at /usr/local/Qt-6.2.3/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:1541 (get_target_property): get_target_property() called with non-existent target "Qt6::QXcbGlxIntegrationPlugin_init". Call Stack (most recent call first): /usr/local/Qt-6.2.3/lib/cmake/Qt6/QtPublicPluginHelpers.cmake:198 (*qt_internal_propagate_object_library) /usr/local/Qt-6.2.3/lib/cmake/Qt6Gui/Qt6GuiPlugins.cmake:53 (*qt_internal_add_static_plugin_import_macro) /usr/local/Qt-6.2.3/lib/cmake/Qt6Gui/Qt6GuiPlugins.cmake:66 (__qt_internal_add_static_plugins_once) /usr/local/Qt-6.2.3/lib/cmake/Qt6Gui/Qt6GuiConfig.cmake:121 (include) /usr/local/Qt-6.2.3/lib/cmake/Qt6/Qt6Config.cmake:177 (find_package) cmake/FindQt5.cmake:57 (find_package) CMakeLists.txt:56 (find_package)

CMake Error at cmake/FindQt5.cmake:64 (set_property): Attempt to promote imported target "Qt6::Test" to global scope (by setting IMPORTED_GLOBAL) which is not built in this directory. Call Stack (most recent call first): src/libs/extensionsystem/CMakeLists.txt:21 (find_package)

CMake Error at cmake/FindQt5.cmake:68 (set_property): Attempt to promote imported target "Qt6::TestPrivate" to global scope (by setting IMPORTED_GLOBAL) which is not built in this directory. Call Stack (most recent call first): src/libs/extensionsystem/CMakeLists.txt:21 (find_package)

Make Error at cmake/FindQt5.cmake:64 (set_property): Attempt to promote imported target "Qt6::Quick3D" to global scope (by setting IMPORTED_GLOBAL) which is not built in this directory. Call Stack (most recent call first): src/tools/qml2puppet/CMakeLists.txt:145 (find_package)

CMake Error at cmake/FindQt5.cmake:68 (set_property): Attempt to promote imported target "Qt6::Quick3DPrivate" to global scope (by setting IMPORTED_GLOBAL) which is not built in this directory. Call Stack (most recent call first): src/tools/qml2puppet/CMakeLists.txt:145 (find_package)

CMake Error at cmake/FindQt5.cmake:64 (set_property): Attempt to promote imported target "Qt6::Quick3DAssetImport" to global scope (by setting IMPORTED_GLOBAL) which is not built in this directory. Call Stack (most recent call first): src/tools/qml2puppet/CMakeLists.txt:165 (find_package)

CMake Error at cmake/FindQt5.cmake:68 (set_property): Attempt to promote imported target "Qt6::Quick3DAssetImportPrivate" to global scope (by setting IMPORTED_GLOBAL) which is not built in this directory. Call Stack (most recent call first): src/tools/qml2puppet/CMakeLists.txt:165 (find_package)

CMake Error at cmake/FindQt5.cmake:64 (set_property): Attempt to promote imported target "Qt6::Quick3DParticles" to global scope (by setting IMPORTED_GLOBAL) which is not built in this directory. Call Stack (most recent call first): src/tools/qml2puppet/CMakeLists.txt:173 (find_package)

CMake Error at cmake/FindQt5.cmake:68 (set_property): Attempt to promote imported target "Qt6::Quick3DParticlesPrivate" to global scope (by setting IMPORTED_GLOBAL) which is not built in this directory. Call Stack (most recent call first): src/tools/qml2puppet/CMakeLists.txt:173 (find_package)

CMake Error at cmake/FindQt5.cmake:64 (set_property): Attempt to promote imported target "Qt6::Quick3DAssetUtils" to global scope (by setting IMPORTED_GLOBAL) which is not built in this directory. Call Stack (most recent call first): src/tools/qml2puppet/CMakeLists.txt:182 (find_package)

CMake Error at cmake/FindQt5.cmake:68 (set_property): Attempt to promote imported target "Qt6::Quick3DAssetUtilsPrivate" to global scope (by setting IMPORTED_GLOBAL) which is not built in this directory. Call Stack (most recent call first): src/tools/qml2puppet/CMakeLists.txt:182 (find_package)

CMake Error at cmake/FindQt5.cmake:64 (set_property): Attempt to promote imported target "Qt6::QuickTimeline" to global scope (by setting IMPORTED_GLOBAL) which is not built in this directory. Call Stack (most recent call first): src/tools/qml2puppet/CMakeLists.txt:182 (find_package)

CMake Error at cmake/FindQt5.cmake:68 (set_property): Attempt to promote imported target "Qt6::QuickTimelinePrivate" to global scope (by setting IMPORTED_GLOBAL) which is not built in this directory. Call Stack (most recent call first): src/tools/qml2puppet/CMakeLists.txt:182 (find_package)