Probably not a Qt bug because it looks a lot like a bug in visual studio 2022   

Ut fails to link at least Qt6MultimediaQuick and Qt6WebEngineQuick

with the following error.

_{Creating library qtbase\lib\Qt6WebEngineQuick.lib and object qtbase\lib\Qt6WebEngineQuick.exp
unity_0_cxx.cxx.obj : error LNK2001: unresolved external symbol "public: __cdecl QExplicitlySharedDataPointer<struct QWebEnginePermissionPrivate>::~QExplicitlySharedDataPointer<struct QWebEnginePermissionPrivate>(void)" (??1?$QExplicitlySharedDataPointer@UQWebEnginePermissionPrivate@@@@QEAA@XZ)
webenginequick_qmltyperegistrations.cpp.obj : error LNK2001: unresolved external symbol "public: __cdecl QExplicitlySharedDataPointer<class QWebEngineExtensionInfoPrivate>::~QExplicitlySharedDataPointer<class QWebEngineExtensionInfoPrivate>(void)" (??1?$QExplicitlySharedDataPointer@VQWebEngineExtensionInfoPrivate@@@@QEAA@XZ)
qtbase\bin\Qt6WebEngineQuick.dll : fatal error LNK1120: 2 unresolved externals}
[