Code main.py:

import sys

from PyQt5.QtWidgets import QApplication, QScrollArea, QWidget, QGridLayout, QVBoxLayout


from PyQt5 import QtGui , uic

from PyQt5.QtGui import QDrag



class MainWidget(QWidget):
    
    def __init__(self, *args, **kwargs):
        
        super().__init__()
        
        uic.loadUi('test006-001.ui' , self)
    
        self.show()
        
if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = MainWidget()
    
    # w.show()
    sys.exit(app.exec_())
   

test006-001.ui :

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Form</class>
 <widget class="QWidget" name="Form">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>698</width>
    <height>635</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Form</string>
  </property>
  <layout class="QGridLayout" name="gridLayout">
   <item row="0" column="0">
    <widget class="QScrollArea" name="scrollArea">
     <property name="verticalScrollBarPolicy">
      <enum>Qt::ScrollBarAlwaysOn</enum>
     </property>
     <property name="widgetResizable">
      <bool>true</bool>
     </property>
     <widget class="QWidget" name="scrollAreaWidgetContents">
      <property name="geometry">
       <rect>
        <x>0</x>
        <y>-37</y>
        <width>315</width>
        <height>598</height>
       </rect>
      </property>
      <property name="sizePolicy">
       <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout">
       <item>
        <widget class="QLineEdit" name="lineEdit"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_2"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_3"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_4"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_13"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_5"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_12"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_11"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_6"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_16"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_14"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_7"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_15"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_8"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_9"/>
       </item>
       <item>
        <widget class="QLineEdit" name="lineEdit_10"/>
       </item>
      </layout>
     </widget>
    </widget>
   </item>
   <item row="0" column="1">
    <widget class="QScrollArea" name="scrollArea_2">
     <property name="verticalScrollBarPolicy">
      <enum>Qt::ScrollBarAlwaysOn</enum>
     </property>
     <property name="widgetResizable">
      <bool>true</bool>
     </property>
     <widget class="QWidget" name="scrollAreaWidgetContents_2">
      <property name="geometry">
       <rect>
        <x>0</x>
        <y>0</y>
        <width>315</width>
        <height>305</height>
       </rect>
      </property>
      <property name="sizePolicy">
       <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
     </widget>
    </widget>
   </item>
   <item row="1" column="0">
    <widget class="QScrollArea" name="scrollArea_3">
     <property name="verticalScrollBarPolicy">
      <enum>Qt::ScrollBarAlwaysOn</enum>
     </property>
     <property name="widgetResizable">
      <bool>true</bool>
     </property>
     <widget class="QWidget" name="scrollAreaWidgetContents_3">
      <property name="geometry">
       <rect>
        <x>0</x>
        <y>0</y>
        <width>315</width>
        <height>304</height>
       </rect>
      </property>
      <property name="sizePolicy">
       <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
     </widget>
    </widget>
   </item>
   <item row="1" column="1">
    <widget class="QScrollArea" name="scrollArea_4">
     <property name="verticalScrollBarPolicy">
      <enum>Qt::ScrollBarAlwaysOn</enum>
     </property>
     <property name="widgetResizable">
      <bool>true</bool>
     </property>
     <widget class="QWidget" name="scrollAreaWidgetContents_4">
      <property name="geometry">
       <rect>
        <x>0</x>
        <y>0</y>
        <width>315</width>
        <height>304</height>
       </rect>
      </property>
      <property name="sizePolicy">
       <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
     </widget>
    </widget>
   </item>
  </layout>
 </widget>
 <resources/>
 <connections/>
</ui>

I tried different size policies etc in Designer but cannot accomplish my goal of having always the for QScrollAreas of same size while resizing my main Widget, I get it only at full screen and smallest size :

but not at intermediate sizes :

Any idea about how to force keeping same size while resizing ?