Vertical QTabWidget for PySide6
PySide6 >= 6.4
python -m pip install PySide6_VerticalQTabWidget
from PySide6.QtWidgets import QWidget
from PySide6_VerticalQTabWidget import VerticalQTabWidget
vertical_tab_widget = VerticalQTabWidget()
widget1 = QWidget()
widget2 = QWidget()
vertical_tab_widget.addTab(widget1, "First Tab")
vertical_tab_widget.addTab(widget2, "Second Tab")