Virtual keyboard not loading

[Milad]

I am trying to run my software on raspberry 4 running "Raspbian GNU/Linux 11 (bullseye)" without any windowing system, (i use eglfs platform to run it)
i installed qt libraries using apt package manager and i could run my software but when im trying to use Qt virtual keyboard (when i use InputPanel in my main qml file) i get following errors and my software doesn't run!

QQmlApplicationEngine failed to load component
qrc:/main.qml:124:9: Type InputPanel unavailable
qrc:/QtQuick/VirtualKeyboard/content/InputPanel.qml:32:1: module "QtQml" plugin "qmlplugin" not found

i have to say i also use this line in my main.cpp :(

qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard"));

I also installed this packages: qml-module-qtquick-virtualkeyboard qtvirtualkeyboard-plugin and libqt5virtualkeyboard5

For me this line seems to be a bug but i coudn't go furthur to investigate the issue as i coudn't see similar issue on the web!!.

qrc:/QtQuick/VirtualKeyboard/content/InputPanel.qml:32:1: module "QtQml" plugin "qmlplugin" not found

Thanks for any help