I installed Qt 6.6.3 and and tried my C++ widget application (QList and QLineEdit).
The bugs in 6.7.2 was NOT there. So instead of rewriting in QML I continue with 6.6.3 for Android projects.
As I already said, QtWidgets has never been intended to work with mobile devices. So knowing the history of Qt, knowing why QtQuick has been created ... I wouldn't expect this bug to be addressed.