ProtobufQuick missing when building QT 6.8 from source

CMake Error at src/NextAppUi/CMakeLists.txt:47 (find_package):
[cmake]   Found package configuration file:
[cmake] 
[cmake]     /opt/qt-static/lib/cmake/Qt6/Qt6Config.cmake
[cmake] 
[cmake]   but it set Qt6_FOUND to FALSE so package "Qt6" is considered to be NOT
[cmake]   FOUND.  Reason given by package:
[cmake] 
[cmake]   Failed to find required Qt component "ProtobufQuick".
[cmake] 
[cmake]   Expected Config file at
[cmake]   "/opt/qt-static/lib/cmake/Qt6ProtobufQuick/Qt6ProtobufQuickConfig.cmake"
[cmake]   does NOT exist

From CmakeLists.txt:
{{}}

find_package(Qt6 6.7 REQUIRED COMPONENTS Core Gui Quick QuickControls2 Svg Test Grpc Concurrent Test Multimedia)if(Qt6Core_VERSION VERSION_LESS "6.8.0")
    message("Using an old QT version. 6.8 is required for the current grpc plugin")
    find_package(Qt6 6.8 REQUIRED COMPONENTS Protobuf)
else ()
    find_package(Qt6 6.8 REQUIRED COMPONENTS ProtobufQuick)
    set (PROTOBUF_QML_DEPENDENCY Qt::ProtobufQuick)
endif()

CMakeLists.txt that fails: https://github.com/jgaa/next-app/blob/6f277f01e340c3f4cfed7a1226e5085e266f7cb5/src/NextAppUi/CMakeLists.txt

Note that the same error occur when compiling for Android with QT 6.8 beta 3. See https://bugreports.qt.io/browse/QTBUG-126383

Building with Qt 6.8 beta 2/3 for Desktop (Linux, MacOS, Windows) work fine using QT downloaded with }}the "QT Maintenance Tool". {{