How to add labels on X axis and Y axis of a QChart?

[Rangerguy128]

This is how the chart ends up looking:

Mind you that I'm calling this method for the labels:

def add_axis_labels(self):
       # Create a custom label for the X-axis
       x_axis_label = QGraphicsTextItem("Niveles de pH")
       x_axis_label.setFont(QFont("Arial", 10))
       x_axis_label.setDefaultTextColor(Qt.white)
       x_axis_label.setPos(self.chart.plotArea().center().x(), self.chart.plotArea().bottom() + 230)
       x_axis_label.setRotation(-90)
       self.chart.scene().addItem(x_axis_label)

       # Create a custom label for the Y-axis
       y_axis_label = QGraphicsTextItem("Muestras")
       y_axis_label.setFont(QFont("Arial", 10))
       y_axis_label.setDefaultTextColor(Qt.white)
       y_axis_label.setPos(310, 330)
       self.chart.scene().addItem(y_axis_label)

It's a bit more tedious and I was recommended to use setTitleText() instead but it doesn't seem to work somehow. I'm using PyQt5 so I'm not sure if only works on older versions. Any advice?