How to bind item size to PyQt5/PyQt6 window size?

Question

PyQt

I made an application that downloads videos from YouTube, everything was fine, but I could not make the full screen mode due to the fact that when it was turned on, the size of the widgets did not change. To make it easier for you, I made a test program. I am using a different file to write program logic.

First (main):

from PyQt6 import QtCore, QtGui, QtWidgets


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(640, 480)
        MainWindow.setStyleSheet("background-color: rgb(85, 85, 127);")
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(270, 376, 91, 73))
        self.pushButton.setObjectName("pushButton")
        self.radioButton = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton.setGeometry(QtCore.QRect(170, 336, 91, 20))
        self.radioButton.setObjectName("radioButton")
        self.radioButton_2 = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_2.setGeometry(QtCore.QRect(350, 336, 91, 20))
        self.radioButton_2.setObjectName("radioButton_2")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(220, 32, 271, 16))
        self.label.setObjectName("label")
        self.textEdit = QtWidgets.QTextEdit(self.centralwidget)
        self.textEdit.setGeometry(QtCore.QRect(250, 144, 104, 71))
        self.textEdit.setObjectName("textEdit")
        MainWindow.setCentralWidget(self.centralwidget)
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton.setText(_translate("MainWindow", "PushButton"))
        self.radioButton.setText(_translate("MainWindow", "RadioButton"))
        self.radioButton_2.setText(_translate("MainWindow", "RadioButton"))
        self.label.setText(_translate("MainWindow", "TextLabel"))

Second (For writing logic):

import sys
from PyQt6.QtWidgets import QApplication, QMainWindow
from file import Ui_MainWindow


app = QApplication(sys.argv)
window = QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(window)



window.show()
sys.exit(app.exec())