I've noticed that some unused Qt shared libs are bundled into app package, increasing its size, i dint find any documented way to exclude them from being bundled into APK, e.g:

libQt6QuickControls2Basic_arm64-v8a.so
libQt6QuickControls2BasicStyleImpl_arm64-v8a.so
libqml_QtQuick_Controls_Basic_qtquickcontrols2basicstyleplugin_arm64-v8a.so
libqml_QtQuick_Controls_Basic_impl_qtquickcontrols2basicstyleimplplugin_arm64-v8a.so
libQt6QmlModels_arm64-v8a.so
libqml_QtQml_Models_modelsplugin_arm64-v8a.so
libqml_Qt_labs_qmlmodels_labsmodelsplugin_arm64-v8a.so
libQt6QuickTemplates2_arm64-v8a.so
libqml_QtQuick_Templates_qtquicktemplates2plugin_arm64-v8a.so

-while only 'Material' style used in project and nothing from models are used. Also libQt6Network_arm64-v8a.so (1.7 MB) are always bundled, which i don't use anywhere directly in code.

As of Qt 6.7/6.8/6.9 there is qt_import_plugins() CMake command, which can be used to exclude few unused things, but not all of them

qt_import_plugins(app
  INCLUDE_BY_TYPE imageformats Qt6::QSvgPlugin
  EXCLUDE_BY_TYPE qmltooling tls iconengines networkinformation
)

That's kinda other topic, but: biggest lib is libQt6Gui_arm64-v8a.so (7.5 MB) maybe there could be optional shredded/lighter versions of it for deployment Android/IOS targets.