Pyqt6: How to style a Tabwidget to be a vertical tab with horizontal text alignment with a checkbox?

Question

I used this question/answer (pyqt5 tabwidget vertical tab horizontal text alignment left) to position the tabs vertically and text horizontal but I am unable to move the tabButton (QCheckBox) that I am adding from the center of the text.

class TabBar(QtWidgets.QTabBar):
    def tabSizeHint(self, index):
        s = QtWidgets.QTabBar.tabSizeHint(self, index)
        s.transpose()
        return s

    def paintEvent(self, event):
        painter = QtWidgets.QStylePainter(self)
        opt = QtWidgets.QStyleOptionTab()

        for i in range(self.count()):
            self.initStyleOption(opt, i)
            painter.drawControl(QtWidgets.QStyle.CE_TabBarTabShape, opt)
            painter.save()

            s = opt.rect.size()
            s.transpose()
            r = QtCore.QRect(QtCore.QPoint(), s)
            r.moveCenter(opt.rect.center())
            opt.rect = r

            c = self.tabRect(i).center()
            painter.translate(c)
            painter.rotate(90)
            painter.translate(-c)
            painter.drawControl(QtWidgets.QStyle.CE_TabBarTabLabel, opt)
            painter.restore()


class CheckableTabWidget(QtWidgets.QTabWidget):
    """
    Creates a clickable tab widget.
    """
    checked_list = []

    def __init__(self, *args, **kwargs):
        QtWidgets.QTabWidget.__init__(self, *args, **kwargs)
        self.setTabBar(TabBar(self))
        self.setTabPosition(QtWidgets.QTabWidget.West)

    def addTab(self, widget, title):
        """
        Add a tab to the tab bar.
        :param widget: the widget to add to the tab bar.
        :param title: string to display on the tab bar.
        """
        QtWidgets.QTabWidget.addTab(self, widget, title)
        checkbox = QtWidgets.QCheckBox()
        self.checked_list.append(checkbox)
        self.tabBar().setTabButton(self.tabBar().count()-1,
                                   QtWidgets.QTabBar.LeftSide, checkbox)

How it currently looks: ie. checkbox on top of text

Ideally, I would like it to be to the left or right of the text.