PySide6 QTree update value of specific row/column

Question

I created a simple tree and a button. What I want to do is increase the cat's power by 1 each time I press the button. Assuming that I already know cat's position (root -> second item -> second item), how can I update the progress bar in increaseValue?

import sys

from PySide6.QtCore import QSize, Qt, Slot
from PySide6.QtWidgets import QApplication, QMainWindow, QTreeWidget, QTreeWidgetItem, QProgressBar, QPushButton, \
    QVBoxLayout, QWidget

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("My App")

data = {"Canidae": {"Wolf": 70, "Fox": 40, "Dog": 30},
        "Felidae": {"Tiger": 100, "Cat": 20}};

app = QApplication(sys.argv)

tree = QTreeWidget()
tree.setColumnCount(2)
tree.setHeaderLabels(["Animal", "Power"])
tree.setColumnWidth(0, 150)
tree.setColumnWidth(1, 200)

items = []
for key, values in data.items():
    item = QTreeWidgetItem([key])
    for key2, values2 in values.items():
        pb = QProgressBar();
        pb.setRange(0, 100);
        pb.setValue(values2);
        pb.setAutoFillBackground(True);
        child = QTreeWidgetItem([key2])

        item.addChild(child)
        tree.setItemWidget(child, 1, pb);
    items.append(item)

@Slot()
def increaseValue():
    print("Button clicked");

tree.insertTopLevelItems(0, items)
tree.expandAll();

testButton = QPushButton("Test");
testButton.clicked.connect(increaseValue)

layout = QVBoxLayout();
layout.addWidget(tree);
layout.addWidget(testButton);

window = MainWindow()
window.resize(400, 300)
window.show()

dummy = QWidget()
dummy.setLayout(layout)
window.setCentralWidget(dummy)

app.exec()