Less mature for the moment, but it's getting more official support and resources, so that will probably change. (They've also changed the name from PySide2 to Qt for Python.)

http://blog.qt.io/blog/2018/04/13/qt-for-python-is-coming-to...

License-wise: "Qt for Python will have the same licensing as Qt for Application Development, i.e. it will be available under GPL, LGPL and commercial."