QStyleOptionProgressBar have no way to change progress bar orientation.

I am using  QStyleOptionProgressBar to make progress bar in QTabView by PySide6.

But I find the progressbar default orientation is vertical and I cant find any way to change it.

When I was using PySide2 , the default orientation is horizontal, and also can change it by QStyleOptionProgressBar.orientation¶; but there is no that option in PySide6.

Please help me ,how can I change the oritention to Horizontal in PySide6

Thanks