Solid Unified UI for all major mobile platforms iOS/Android/Win Mobile

I`m a totally new to Qt, but while looking at the demos and examples noticed that most of the UI looks different on different platforms, adapting UI controls to OS native look and feel.
Is it possible to create a solid and unified user interface and User Experience on iOS/Android/Win Mobile using Qt?
Is there any possibilities to create new and customize existing UI controls?

Native styling is just the default option, both for QtWidget UIs and UIs using QtQuick.Controls.
For widgets one can use any of the cross platform styles or an own style, similar for QtQuick.Controls, but they can also be styled in QML and one can easily create own components instead.

Cheers,
_