Hi,
seems to be fixed.
I just built OpenCV 4.6.0 with Qt 6.3.1 under Win10 basically following the instructions on https://wiki.qt.io/How_to_setup_Qt_and_openCV_on_Windows by using Qt6_DIR instead of Qt5_DIR during configure.
BR
Christian
PS:
Smoketest of runtime successful with example from link above and slight modifications in the pro-file using the correct dll versions
LIBS += C:\YOURPATH\opencvbuild\install\x64\mingw\bin\libopencv_core460.dll
LIBS += C:\YOURPATH\opencvbuild\install\x64\mingw\bin\libopencv_highgui460.dll
LIBS += C:\YOURPATH\opencvbuild\install\x64\mingw\bin\libopencv_imgcodecs460.dll
LIBS += C:\YOURPATH\opencvbuild\install\x64\mingw\bin\libopencv_imgproc460.dll
LIBS += C:\YOURPATH\opencvbuild\install\x64\mingw\bin\libopencv_features2d460.dll
LIBS += C:\YOURPATH\opencvbuild\install\x64\mingw\bin\libopencv_calib3d460.dll